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  • 1.
    Abrahamsson, Linus
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Kvalitetssäkring av Quick Change™-produkter vid Rototilt Group2021Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Rototilt Group AB is a company located in Vindeln that produces and sells tiltrotators, machine couplers and other different excavator accessories. Since Rototilt recently launched a new series of products, and is expanding their factory, they have not been able to assign any workforce on the quality assurance of their new products. Therefore, this project aims at ensuring that quality is maintained, and that the verifications process is streamlined.

    The work is based on measuring the time spent on each segment in the verifying process, and to identify the segments that have the largest influence on quality. Thereafter, every type of deviation Rototilt has experienced since launching the Quick Change™ product series was analysed.

    It was found that the verification process takes 17 minutes on average, which is a process time Rototilt is aiming to reduce. A compilation of the deviations since the launching of Quick Change™, indicates that the main problems are product quality and lack of documentation. Based on the analysis of process time and type of deviation, a chart with conceptual solutions forms a solid foundation for implementation, which will result in a winwin situation for the operator as well as the company. One solution that stands out is to invest in quick hydraulic couplers. Another solution is to implement In-Process Verification to ensure the quality instead of the current End of Line Testing method. The analysis indicated which parts were crucial for maintaining the quality, and which were crucial for the efficiency. Recommended concepts are based on minimizing investment costs and efforts for implementation and maximizing improvement of the work environment for the operator.

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  • 2.
    Asplund, Jesper
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Processkartläggning och metodstudier på Ålö AB2014Independent thesis Basic level (professional degree), 180 HE creditsStudent thesis
  • 3.
    Beldiceanu, Nicolas
    et al.
    IMT Atlantique, LS2N-CNRS, Nantes, France.
    Dolgui, Alexandre
    IMT Atlantique, LS2N-CNRS, Nantes, France.
    Gonnermann, Clemens
    TUM, Munich, Germany.
    Gonzalez-Castañé, Gabriel
    University College Cork, Ireland.
    Kousi, Niki
    Laboratory for Manufacturing Systems and Automation, University of Patras, Patras, Greece.
    Meyers, Bart
    CodesignS, Flanders Make vzw, Belgium.
    Prud'homme, Julien
    IMT Atlantique, LS2N-CNRS, Nantes, France.
    Thevenin, Simon
    IMT Atlantique, LS2N-CNRS, Nantes, France.
    Vyhmeister, Eduardo
    University College Cork, Ireland.
    Östberg, Per-Olov
    Umeå University, Faculty of Science and Technology, Department of Computing Science.
    Assistant: Learning and robust decision support system for agile manufacturing environments2021In: IFAC-PapersOnLine, Elsevier, 2021, p. 641-646Conference paper (Refereed)
    Abstract [en]

    The European project ASSISTANT will provide a set of AI-based digital twins that helps process engineers and production planners to operate collaborative mixed-model assembly lines based on the data collected from IoT devices and external data sources. Such a tool will help planners to design the assembly line, plan the production, operate the line, and improve process tuning. In addition, the system monitors the line in real-time, ensures that all required resources are available, and allows fast re-planning when necessary. ASSISTANT aims to make cost-effective decisions while ensuring product quality, safety and wellbeing of the workers, and managing the various sources of uncertainties. The resulting digital twin systems will be data-driven, agile, autonomous, collaborative and explainable, safe but reactive.

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  • 4.
    Byhlin, Axel
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Koncept för automatiserad produktmärkning2023Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Indexator is a world-leading company that develops and manufactures hydraulic rotators and hose swivels. A hose swivel is a hose coupling that can rotate freely around its own axis. During production he hose swivel currently has a semiautomatic marking process, where an operator often must load a laser engraver. Indexator wishes to streamline this process. This study aims to develop a concept for a more efficient process through automation that will free personnel from non-value added activities.

    First, three concept proposals were developed based on theories of efficiency in industry, such as Toyota production systems, Lean, Six Sigma, and 5s. The concept proposals were limited to primarily developing the function of the process. In collaboration with Indexator, the three concept proposals were scored in a comparison table to choose one of the concepts to develop further. The concept proposal chosen for further development was one with a robot arm that loads the laser engraver and an automatic magazine that supplies the robotarm with hose swivels. The developed concept proposal will free the operator from the machine for one hour before the magazine needs to be refilled. Today’s process frees the operator for 2.5 min per load. The concept will also eliminate 75 min of non-value added work. The concepts magazine capacity is large enough to handle half of the average marking per day, which means that the magazine needs to be reloaded once per day. Compared to today´s process that requires to be loaded approximately 30 times a day because the process lacks a magazine. 

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  • 5.
    Campano, Erik
    Umeå University, Faculty of Social Sciences, Department of Informatics.
    Pierre Lévy's kansei philosophy as understood through human-computer interaction theories2022In: 2022 10th International Conference on Affective Computing and Intelligent Interaction, (ACII), Institute of Electrical and Electronics Engineers (IEEE), 2022Conference paper (Refereed)
    Abstract [en]

    French industrial designer Pierre Lévy has proposed a way to understand the philosophy behind kansei engineering. His account is perhaps the most detailed explanation of kansei philosophy in a langauge other than Japanese. Lévy's proposal draws on the ideas of twentieth century Kyoto School founder Kitarou Nishida-particularly Nishida's interest in phenomenology, and his concepts of action-intuition, pure experience, and basho Five particular elements of Lévy's explanation can be compared to fundamental concepts in theories from the discipline of human-computer interaction. These theories include, but are not limited to, Paul Dourish's embodied interaction, Pierre Rabardel's instrumental genesis, and Susanne BOdker's human-artifact model. Kansei philosophy is thereby characterizable with an entirely new vocabulary and analytical framework, arising from the human computer interaction literature. This new framework gives scholars in both Japanese and non-Japanese sociocultural settings a set of novel conceptual tools to understand kansei philosophy.

  • 6.
    Cederquist, Joel
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Från zinkfosfatering till silanbehandling: Potentiell kostnadsbesparing i förbehandlingen hos Ålö AB2015Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of this thesis is to investigate if cost reductions can be accomplished by changing the pretreatment method from zinc-phosphating to silane at Ålö’s plant in Brännland.

    A survey has been conducted to identify economic benefits and drawbacks of the two techniques. The survey, facilitated by chemical supplier, Chemetall, is in the form of an application for calculation of process and chemical parameters for the current process so that comparative results can be presented for evaluation in the form of prospective savings per annum in the event of a change of pretreatment method.

    The zinc-phosphating technique is a conventional method, utilizing activation and crystallization steps, which, when correctly exercised, facilitates both good corrosion resistance and paint adhesion. Drawbacks of this method include high water and energy consumption, maintenance costs, and the generation of toxic waste that requires human handling and expensive disposal.

    Silane pretreatment is a comparatively new method used by Ålö’s facilities in the USA and China, as well as established international automotive manufacturers. This method of pretreatment has developed the quality and stability aspects considerably, has the advantages of lower water and energy consumption and a non-toxic waste generating process. It is considered capable of fully replacing zinc-phosphating without compromising corrosion resistance or paint adhesion characteristics.

    The most important conclusion from this thesis is that the silane pretreatment method is economically beneficial for Ålö at the current rate of production (21 333 front-loaders per annum), with an estimated cost reduction of 25 % or more than € 50 000 per annum. The results of this report also indicate a rise in economic benefits with silane pretreatment in the event of increased production rates.

    This shows that although the silane pretreatment method entails the possibility of substantial annual cost reduction, further investigation in this field is required.

  • 7. Chafi, Maral Babapour
    et al.
    Harder, Mette
    Umeå University, Faculty of Science and Technology, Umeå School of Architecture.
    Danielsson, Christina Bodin
    Workspace preferences and non-preferences in Activity-based Flexible Offices: Two case studies2020In: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126, Vol. 83, article id 102971Article in journal (Refereed)
    Abstract [en]

    Activity-based Flexible Offices (AFOs) are innovations in workspace design that are being increasingly implemented in organisations. While most studies investigate satisfaction and perceived work support in AFOs, employees' workspace preferences are not addressed in the literature. The aims of this study were to (i) identify workspace preferences and non-preferences in AFOs, and (ii) investigate whether employees' workstation choices support their activities and align with their preferences. Two Swedish municipalities participated in the study. Data collection involved 27 semi-structured interviews and annotations on architectural drawings. The results showed that the interviewees preferred workstations that were both desirable and functional, and avoided workstations that were undesirable. This was due to functional, social, emotional and symbolic aspects of the workspaces as well as their physical structure and stimuli. The approach used in this paper can be adopted for improving the design of AFOs, thereby mitigating the stress of finding a suitable workstation.

  • 8.
    Christiansen, Anton
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Analys av Overall Effectiveness av en bandtransportör2022Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    At Boliden's mine Aitik, one of Europe's largest open-pit mines and one of the world's most efficient mines, there is still much today that can be done better to further increase the efficiency of mining. In this project, parts of the conveyor-belt infrastructure within the Aitik industrial area were investigated and analysed with the aim of increasing the efficiency and profitability of Aitik's mining operations. 

    The focus of the work is the main belt conveyor for Aitik's production, designated BT2030, and whether it is possible to implement section stops to increase efficiency. During the project it was investigated if it is possible to use the existing equipment that is currently not used to its full capacity on the BT2030. The focus was on the ROXON conveyor guards and the programmed sections of the conveyor and if they can be used to full capacity. 

    The majority of this work was done theoretically where calculations following the LEAN concept of Overall Equipment Effectiveness, also known as OEE, were presented to strengthen the theory.  In ABB's 800xA control system, belt stop logs were examined to see the reasons for belt stoppages. By taking the theoretical maximum production, time and capacity the belt has been used in practice, OEE has been applied to calculate the efficiency of BT2030.

    The results show that it is quite possible to implement section stop on BT2030, and that there are two options for implementation. Either use ROXON's own software and have it communicate with the control system from ABB. The alternative is to calculate the exact location of the sections to make them stop at the desired location and then implement it in the ABB control system. It was also found that the efficiency of the BT2030 could be improved.

    During the production study for BT2030, it came up with an OEE figure of 58.1% for the year 2021. Similarly, BT2030 comes up with an OEE of 58.5% in the first part of 2022. Overall, an OEE of 80% and above is considered world class, implying that improvements can be made to get up to that level of efficiency.

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  • 9.
    Eriksson, Marcus
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Produktionsunderlag för fixtur till BioProcessramar2017Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This bachelor thesis is made on behalf of General Electric Healthcare Bio-Sciences AB in Umea. GE Healthcare is a company that produces health care products. One of these products is BioProcess which is used in medical research and the manufacturing of pharmaceuticals. The product often have to be modified since itis soldcustomer modified. There are two different frame sizes. The frames are often tilted 90 degrees to make the modification areas easier to access. The modifications made is mostly trace grooves and holes.The project goal was to create a fixture that fits both frames and will make the modifications made to the frames easier. The fixture should reduce the bodily wear that is caused by modifying these frames. The structure of the fixture must meet requirements of functionality and safety.The result of the project is a fixture that is compatible with both frame sizes. The fixture has been dimensioned with a safety factor of 4. This safety factor was chosen because of the risks in the operations.

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    Produktionsunderlag för fixtur till BioProcessramar
  • 10.
    Eskilsson, Gustav
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Tappningsrobot blykaldoverk: Automatisering av provtagning, temperaturmätning och och klabbning för blykaldo.2016Independent thesis Basic level (professional degree), 180 HE creditsStudent thesis
  • 11.
    Forsgren, Zebastian
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Nykonstruktion av krympbänk2019Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Cranab is a company that specializes and manufactures cranes and grippers for forwarders, harvesters and trucks. During the manufacturing process, a shrink fit bench is used to assemble two parts together. The part that is being assembled is called a pillar. The pillar has two big components, a pipe and a splined part. These two parts is being assembled in the shrink fit bench. The current shrink fit bench is using a propane torch to heat the pipe so the splined part can be inserted. After the pipe has cooled down the part is assembled with a shrink fit. The purpose of this thesis is to draw and deliver a new concept of a new and improved shrink fit bench. The method used is to study the current shrink fit bench and draw a new one using Autodesk Inventor. The new and improved shrink fit bench is using an induction heater instead of a propane torch. The result of this work is a shrink fit bench with drawings and associated calculations and explanations of induction and comparisons on different types of induction coils.

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  • 12.
    Gunnarsson, Adam
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Flödesoptimering vid packning och utleverans av produkter2021Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Rototilt is one of the leading manufacturers in the tiltrotator market. Rototilt is a company based in Vindeln, where they develop and manufacture their own products. This project has been performed on site in Vindeln and has had its focus on the delivery department of the factory. The goal of this thesis was to review the process and layout for delivery of the completed products, and to develop ideas and make suggestions for improvments that can be implemented in the future. The work has been divided into two major parts, where the first was to review and map how the work in the delivery department is currently conducted, and the second was to develop a proposal for a layout and process that can lead to an improved work flow in the department. The work resulted in a proposal for a layout with a conveyor belt that transports the product to be packed around the department. Another option is the use of Automated Guided Vehicles. In order to be able to implement the suggested improvements, Rototilt needs to also adapt the process before the delivery department, such that the products can be packed as soon as they arrive there. 

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  • 13.
    Haciömeroglu, Ömer
    Umeå University, Faculty of Science and Technology, Umeå Institute of Design.
    ERO-Concrete Deconstruction Robot2012Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    The world is changing. Big cities are attracting more and more population, millions every day and growing. Who among the megacity dwellers would want to wake up in the morning staring at a construction demolition site, dusty, rusty and noisy? The increasing need for an improved infrastructure within the mega cities evokes a big industry of building replacements. The complex combination of building materials and methods is making the de-construction and recycling the demolition waste material very difficult. Today's methods are very complex, time consuming and the end use of the by-products are very limited. Moreover all of these methods are further limited by governmental regulations and laws. These laws are held in order to keep the dynamic city life to be able to cope with the de-construction jobs running around the city. Reinforced concrete being the most celebrated and used structural element, how might we find a smarter way to de-construct it and re-use the byproduct more accurately?

  • 14. Haji, A.
    et al.
    Sabahno, Hamed
    Haji, R.
    Developing a partial backlogging deteriorating inventory model with selling price dependent demand rate and cycle length dependent selling price2008In: 2008 IEEE International Conference on Industrial Engineering and Engineering Management, Institute of Electrical and Electronics Engineers (IEEE), 2008, p. 198-202, article id 4737859Conference paper (Refereed)
    Abstract [en]

    In this paper, we develop an inventory model with price dependant demand rate, under time value of money and inflation, finite time horizon, exponential backlogging rate and exponential deterioration rate with the objective of maximizing the present worth of the total system profit. Using a dynamic programming based solution algorithm, we are able to find the optimal sequence of the cycles and also to obtain different optimal selling prices and optimal order quantities for the cycles with unequal lengths, which have never been done before for our model. We also use a proper numerical example to show accuracy of the solution procedure. 

  • 15.
    Haji, Alireza
    et al.
    Department of Industrial Engineering, Sharif University of Technology, Iran.
    Haji, Rasoul
    Department of Industrial Engineering, Sharif University of Technology, Iran.
    Sabahno, Hamed
    Department of Industrial Engineering, Sharif University of Technology, Iran.
    Developing Two Deteriorating Inventory Models with Selling Price Dependant Demand Rate and Cycle Time Dependant Selling Price2007In: Proceedings of the 37th International Conference on Computers and Industrial Engineering / [ed] M. H. Elwany; A. B. Eltawil, Alexandria: Alexandria University , 2007, p. 835-844, article id CIE00284Conference paper (Refereed)
    Abstract [en]

    In this paper we develop two models; the without shortages and the completely backlogging shortages with the price dependant demand rate under time value of money and inflation, finite time horizon and exponentially deterioration rate with the objective of maximizing the present worth of the total system profit. Using the dynamic programming method for each model, we are able to obtain different selling price, order quantity and cycle length for each cycle. We also use a proper numerical example to show accuracy of the solution procedures and to comparethe results. This research and its results are uniqueand have never been concluded before.

  • 16.
    Holmström, Jonny
    et al.
    Umeå University, Faculty of Social Sciences, Department of Informatics.
    Wiberg, MikaelUmeå University, Faculty of Social Sciences, Department of Informatics.Lund, AndreasUmeå University, Faculty of Social Sciences, Department of Informatics.
    Industrial informatics design use and innovation: perspectives and services2010Collection (editor) (Other academic)
    Abstract [en]

    Industrial informatics as a field is currently expanding beyond improving the manufacture of goods to facilitating every aspect of the process, from after-market sales, to service production, sourcing, and e-maintenance, demonstrating the profound impact of informatics in modern society. Industrial Informatics Design, Use and Innovation: Perspectives and Services establishes not only a sound grounding in industrial informatics but it also provides a broad state-of-the-art review and showing connections and gaps in the current knowledge for researchers working in the field today. This compilation also represents guidance to those who design and use information technologies in industrial settings, and making it easier to create an informed basis for decisions.

  • 17.
    Jackson, Jennie
    et al.
    Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Section of Sustainable Health. Department of Occupational Health Sciences and Psychology, University of Gävle, Gävle, Sweden.
    Liv, Per
    Umeå University, Faculty of Medicine, Department of Epidemiology and Global Health. Faculty of Medicine, Umeå University, Umeå, Sweden..
    Sayed-Noor, Arkan S.
    Punnett, Laura
    Wahlström, Jens
    Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Section of Sustainable Health.
    Risk factors for surgically treated cervical spondylosis in male construction workers: a 20-year prospective study2022In: The spine journal, ISSN 1529-9430, E-ISSN 1878-1632, Vol. 23, no 1, p. 136-145Article in journal (Refereed)
    Abstract [en]

    BACKGROUND CONTEXT: Degenerative changes due to cervical spondylosis (CS) can detrimentally affect work ability and quality of life yet understanding of how physical exposure affects disease progression is limited.

    PURPOSE: To assess the associations between occupational physical exposures and occurrence of surgically treated cervical spondylosis (ST-CS) and early exit from the labour market via disability pension.

    STUDY DESIGN/SETTING: Prospective register study with 20 year follow-up period.

    PATIENT SAMPLE: Swedish construction workers participating in a national health surveillance project conducted between 1971-1993.

    OUTCOME MEASURES: Surgically treated cervical spondylosis (ST-CS) and early labour market exit at a minimum rate of 25% time on disability pension.

    METHODS: Associations between occupational physical exposures (job exposure matrix) and subsequent ST-CS (National Hospital in-patient register) and early labour market exit via disability pension (Swedish Social Insurance Agency register) were assessed in a cohort of male construction workers (n=237,699).

    RESULTS: A total of 1381 ST-CS cases were present and a 20-year incidence rate of 35.1 cases per 100,000 person years (95% confidence interval (CI) 33.2-36.9). Increased relative risk (RR) for ST-CS was found for workers exposed to non-neutral (RR 1.40, 95% CI 1.15-1.69) and awkward neck postures (1.52, 1.19-1.95), working with the hands above shoulder height (1.30, 1.06-1.60), and high upper extremity loading (1.35, 1.15-1.59). Increased risk was also present for workers who reported frequent neck (3.06, 2.18-4.30) and upper back (3.84, 2.57-5.73) pain in the 12 months prior to survey. Among workers with elevated arm exposure, higher risk was seen in those who also had more frequent neck pain. ST-CS cases took early retirement more often (41.3%) and at a younger age (53 years) than the total study cohort (14.8% and 56 years of age, respectively).

    CONCLUSIONS: Occupational exposure to non-neutral neck postures, work with hands above shoulders and high loads born through the upper extremities increased the risk for ST-CS and early retirement due to disability. Decreasing postural and load exposure is salient for primary, secondary, and tertiary prevention of CS. Neck pain was shown to be a prognostic factor for ST-CS, which stresses the importance of acting early and taking preventative action to reduce workplace exposure, and the need for systematic medical check-ups within primary or occupational care to mitigate disease progression and early labour market exit due to disability.

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  • 18.
    Johansson, Kristina
    et al.
    Department of Business Administration, Technology and Social Science, Luleå University of Technology, Luleå, Sweden.
    Andersson, Elias
    Department of Forest Resource Management, Swedish University of Agricultural Sciences, Umeå, Sweden.
    Johansson, Maria
    Department of Business Administration, Technology and Social Science, Luleå University of Technology, Luleå, Sweden.
    Lidestav, Gun
    Department of Forest Resource Management, Swedish University of Agricultural Sciences, Umeå, Sweden.
    The Discursive Resistance of Men to Gender-equality Interventions: Negotiating "Unjustness" and "Unnecessity" in Swedish Forestry2019In: Men and Masculinities, ISSN 1097-184X, E-ISSN 1552-6828, Vol. 22, no 2, p. 177-196Article in journal (Refereed)
    Abstract [en]

    This article adds to the understanding of men’s discursive resistance in relation to gender-equality interventions at work. Using Swedish men forestry professionals as the empirical base, the result shows how discursive resistance were performative acts, part of the construction of the same gender-equality interventions and organizational contexts that they were perceived to describe. In this case, direct opposition to gender equality provided a limited discursive position and sets of logics available in practice. Instead, the possibilities to renegotiate gender-equality interventions as unjust and unnecessary required, we conclude that the industry’s ambition to hire and promote more women was perceived to have led to the use of affirmative action and the disruption of meritocratic principles and that the problems of gender equality were placed in the traditional forestry and among “prejudiced old men,” as oppose to the more “modern” and “women friendly” forestry of today.

  • 19.
    Johansson, Maria
    Arbetsvetenskap, Institutionen för ekonomi, teknik och samhälle, Luleå tekniska universitet, Luleå, Sverige.
    Att göra jämställdhet – motiv, motstånd och möjligheter i det svenska skogsbruket2015Licentiate thesis, comprehensive summary (Other academic)
    Abstract [sv]

    Denna licentiatuppsats undersöker hur kön, arbete och jämställdhet görs i svenska skogligt relaterade arbetsorganisationer. Svensk skogsbrukssektor tillskrivs ofta stor betydelse för regional, såväl som nationell, utveckling och i övergången till en mer biobaserad ekonomi. Samtidigt är sektorn numerärt mansdominerad, drygt 90 procent av de i skogsbruket sysselsatta är män, och symboliskt maskulint kodad. Detta framförs ofta av representanter för sektorn själv, inom såväl akademi, näringsliv och myndigheter, som ett hinder för utveckling och skogsbrukssektor uttrycker en önskan om ökad jämställdhet. Ökad jämställdhet, främst i termer av minskad numerär könsobalans i skogsbrukssektorn är dock en fråga som varit aktuell under en längre tid. När skogsbrukssektorn tidigare har adresserat frågan om jämställdhet har fokus framförallt legat på kvinnors situation i sektorn varför det är motiverat att undersöka vad som händer, inte primärt för kvinnor i sektorn (eller de som är utanför men potentiellt skulle kunna vara i sektorn), utan i styrning och policyarbete, bland de män som finns i sektorn och som där utgör norm och i arbetet med att driva dessa frågor i arbetsorganisationerna. Det övergripande syftet med licentiatuppsatsen är därför undersöka hur jämställdhet konstrueras i skogsbrukets arbetsorganisationer. Med utgångspunkt i feministisk teori, och ett perspektiv där kön, såväl som jämställdhet, är något som görs i tal och i vardagliga praktiker, undersöks hur dessa konstruktioner sker på både en övergripande policynivå, på organisationsnivå och på individnivå bland den majoritet av män som arbetar i sektorn.

    Licentiatuppsatsen utgörs av tre artiklar som var och en undersöker hur jämställdhet görs på olika nivåer i skogsbrukssektorn. I den första artikeln analyseras hur jämställdhet görs på strategisk nivå i skogsbrukets arbetsorganisationer genom att studera jämställdhetspolicys från tio olika skogliga organisationer. Den andra artikeln, som genom intervjuer med dem som i företagen implementerar ovan nämnda policys, såsom personalansvariga eller ledningsrepresentanter, utforskar med hjälp av en diskursanalytisk ansats hur konstruerandet av jämställdhet som ett ”business case” får konsekvenser för det handlingsutrymme som skapas i organisationerna. Den tredje artikeln undersöker hur jämställdhetsarbetet (dvs de skrivna policyerna i artikel ett och sätten de implementeras på i artikel två) mottas av män i sektorn genom att analysera hur fritextsvaren i en nationell enkät konstituerar förståelser av jämställdhet, kön och arbete. Gemensamt för respektive artikel är att de sökt analysera mening och mönster i språket, alltså hur det talas eller skrivs om jämställdhet, med utgångspunkten att språket inte bara beskriver utan också gör. Resultatet visar, i linje med tidigare forskning, på hur jämställdhet dels görs till en fråga om och för kvinnor och dels till en avpolitiserad fråga där fokus främst ligger på den organisatoriska (affärs)nyttan som jämställdhet antas föra med sig. Argumentationen kring jämställdhetsarbetets fördelar implicerar också att kvinnor bidrar med något annat till skogsbrukets arbetsorganisationer än vad män traditionellt gjort, vilket förstärker en föreställning om män och kvinnor som i grunden olika.

    Vidare visas hur konstruktioner av jämställdhet färdas i organisationer. Det som på organisatorisk nivå förstås som argument för jämställdhet blir kan bli argument emot jämställdhet på individnivå. Ett exempel på detta är sammanlänkningen mellan kompetensförsörjning och jämställdhet som på policynivå och organisatorisk nivå förstås som positiv, medan det på individnivå i vissa fall vänds till något negativt där kompetensen i sektorn antas hotas av ökad jämställdhet. En konsekvens av att konstruktioner av jämställdhet färdas är att det inte räcker med enbart en välskriven policy, en engagerad ledningsstyrning eller värdegrundsdiskussioner bland medarbetarna. Det krävs dessutom ett helhetsgrepp där också könade föreställningar om kärnverksamheten och om arbete utmanas och synliggörs, vilket inte sker i någon större utsträckning i sektorn idag och som möjligen bidrar till att den fortfarande förknippas med män och vissa sorters maskulinitet. Vidare krävs att intressekonflikter lyfts upp till ytan och synliggörs, vilket visades genom exemplet kring kompetensförsörjningen.

  • 20.
    Johansson, Maria
    et al.
    Department of Business Administration, Technology and Social Sciences, Luleå University of Technology, Luleå, Sweden.
    Johansson, Kristina
    Department of Business Administration, Technology and Social Sciences, Luleå University of Technology, Luleå, Sweden.
    Andersson, Elias
    Department of Forest Resource Management, Swedish University of Agricultural Sciences, Umeå.
    #Metoo in the Swedish forest sector: testimonies from harassed women on sexualised forms of male control2018In: Scandinavian Journal of Forest Research, ISSN 0282-7581, E-ISSN 1651-1891, Vol. 33, no 5, p. 419-425Article in journal (Refereed)
    Abstract [en]

    This study adds to the literature on the gendered culture of the forest sector by examining testimonies of sexual harassment in relation to the gendering of forestry-related competence and organisations and the consequences that the sexualisation of social relations in organisations has, mainly for women. The empirical base of the study comprised testimonies within the campaign #slutavverkat published on Instagram to highlight experiences of sexual harassment of women in the Swedish forest sector. Qualitative content analysis of the testimonies suggested that the situations described in the testimonies in #slutavverkat comprise controlling actions that diminish women's power in the forest sector. Sexualised forms of male control and harassment thus work to remind women that they are first and foremost a representation of women, rather than of forestry professions and knowledge. In that sense, sexualised forms of male control and harassment are part of, rather than deviating from, the overall gendering of forestry as a men-dominated sphere. The study adds to organisational understandings and policy developments on discrimination and harassment and suggests that researchers and policy-makers interested in reducing inequality in forestry need to pay more attention to issues of harassment and sexualisation of social relations.

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  • 21.
    Johansson, Maria
    et al.
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences, Luleå, Sweden.
    Ringblom, Lisa
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences, Luleå, Sweden.
    The Business Case of Gender Equality in Swedish Forestry and Mining: Restricting or Enabling Organizational Change2017In: Gender, Work and Organization, ISSN 0968-6673, E-ISSN 1468-0432, Vol. 24, no 6, p. 628-642Article in journal (Refereed)
    Abstract [en]

    Forestry and mining constitutes an important part of Swedish basic industry. These industries are heavily male-dominated and are expressing an ambition to become more gender equal and less gender-segregated, arguing that this could strengthen their competitiveness in a number of areas. In this article we explore how company representatives construct gender equality as a business case and discuss how these constructions restrict and/or enable gender equality in these organizations. Departing from a social constructivist understanding of how language (re)produces gendered power relations in the workplace, the empirical basis of this paper consists of eight interviews with respondents who possess special insights into, and being of strategic importance to, gender equality issues in forestry and mining companies. In our analysis we found three dominant dimensions of the business case of gender equality Marketing (as) gender equality, Uncovering the male norm and Gender equality as a depoliticized value. We conclude that the business case framing facilitates for the companies to engage in issues of gender equality. However, issues concerning conflicting interests and power relations seem to be difficult to address within the business case discourse. This we argue affects and shapes the terms for gender equality in these organizations

  • 22.
    Kohtala, Cindy
    Aalto University School of Arts, Design and Architecture.
    Addressing sustainability in research on distributed production: An integrated literature review2015In: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 106, p. 654-668Article, review/survey (Refereed)
    Abstract [en]

    This paper presents an integrated literature review on how the environmental sustainability of distributed production is studied in a variety of disciplinary sources. The notion of distributed production suggests an alternative to mass production that differs in scale, location and consumer–producer relationship. Understanding its environmental implications (and thereby dematerialization potential) is regarded pertinent and timely. Key themes in the review included how distributed production can promote product longevity and closed material loops, as well as localizing production. New and closer ties between producer and consumer seemed central discussions but were underdeveloped with regard to sustainability potential. Empirical work was seen especially in research on Additive Manufacturing Processes, while the bulk of the studies were conceptual explorations with little testing in the real world as yet. This affirms the emerging nature of the topic and points to a clear need for more (and more diverse) empirical research. The review summarizes the opportunities for greater environmental sustainability as well as potential threats that could serve to guide and improve these novel practices today. It sets the stage for ‘distributed production’ to be examined as its own phenomenon by proposing how it can be characterized and suggests that a research agenda could build upon the work initiated here.

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  • 23.
    Kotikawatte, Yoheena
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    BRUKSANVISNING TILL DRIFT OCH UNDERHÅLL AV EN EMBALLERINGSMASKIN VID SCA2021Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The material in the report is 10% of the total material presented to SCA, the most important results are reported here. At SCA's sawmill Rundvik in Nordmaling, there is an automated packaging machine. There is no good user manual for use/operation and maintenance of the machine, which has made it difficult for the staff to handle it. The purpose of this work has been to map the machine's parts, functions and then produce a user manual. This was done by first mapping the location of the machine's axles and its functions. The staff at the planer were then interviewed to sort out difficulties and problems with the machine. A problem solution that solves the most common errors has been produced. A maintenance plan has been developed to facilitate maintenance of the machine. A quote for a software update has been sent to the machine programmer. A quote regarding a safety device for the machine has been sent to the machine manufacturer. The result is a fully usable, easy-to-read user manual. The purpose has not been fully fulfilled as the operator has not had time to test the instructions.

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    Examensarbete SCA
  • 24.
    Larsson, Simon
    Umeå University, Faculty of Science and Technology, Umeå Institute of Design.
    Handling of Air Baggage2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The airport staff working with baggage handling have a tough job, lifting up to 15 tones/day per person. Every bag gets lifted manually 6 times on its way from check in to the baggage drop band, which is why the work is very repetitive and often leads to back, shoulder and other kinds of physical problems. My concept, the ABT (Autonomous Baggage Train), removes 4 of these manual lifting moments and also shortens the waiting time for the arriving passengers, reduces the wear on both baggage and the airport´s baggage bands and contributes to a safer working environment.

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  • 25.
    Lindberg, Malin
    et al.
    Luleå tekniska universitet, Arbetsvetenskap.
    Andersson, Eira
    Luleå tekniska universitet, Arbetsvetenskap.
    Andersson, Lisa
    Luleå tekniska universitet, Arbetsvetenskap.
    Johansson, Maria
    Luleå tekniska universitet, Arbetsvetenskap.
    Organizational innovation for gender equality in forestry and mining2016In: Research handbook on gender and innovation / [ed] Gry Agnete Alsos; Ulla Hytti; Elisabet Ljunggren, Cheltenham: Edward Elgar Publishing, 2016, p. 170-186Chapter in book (Refereed)
    Abstract [en]

    Using forestry and mining as empirical cases, the chapter analyses to what extent gender equality efforts in men-dominated industries can be understood as organizational innovations and how the degree of newness in these efforts affects the prospects of evoking structural changes in the gendered patterns of these industries. In the studied gender-equality efforts in one major forestry company and one major mining company in Sweden, carried out during the last ten years, innovative measures of creative workshops, cooperation with gender researchers, and challenging masculinities are identified. Their level of contextual innovativeness is high, although their universal innovativeness is low. The gendered aspects of the innovativeness encompass identification of hitherto unmet needs of gender equality among individuals, organizations and society to some extent. The prospects of the measures evoking structural change in a transformative way vary, with challenging masculinities exposing the highest potential, but only if thoroughly realized.

  • 26.
    Liu, Bokai
    et al.
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Lu, Weizhuo
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Hu, Xiaoyue
    Faculty of Architecture and Urbanism, Bauhaus-Universität Weimar, Weimar, Germany.
    Zhang, Chao
    Yellow River Laboratory, Zhengzhou University, Zhengzhou, China; Institute of Underground Engineering, Zhengzhou University, Zhengzhou, China; National Local Joint Engineering Laboratory of Major Infrastructure Testing and Rehabilitation Technology, Zhengzhou, China; Collaborative Innovation Center for disaster prevention and control of Underground Engineering jointly built by provinces and ministries, Zhengzhou, China.
    Wang, Cuixia
    Yellow River Laboratory, Zhengzhou University, Zhengzhou, China; Institute of Underground Engineering, Zhengzhou University, Zhengzhou, China; National Local Joint Engineering Laboratory of Major Infrastructure Testing and Rehabilitation Technology, Zhengzhou, China; Collaborative Innovation Center for disaster prevention and control of Underground Engineering jointly built by provinces and ministries, Zhengzhou, China.
    Qu, Yilin
    State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an, Shaanxi, China.
    Olofsson, Thomas
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Multiscale modeling of thermal properties in Polyurethane incorporated with phase change materials composites: a case study2023In: Healthy buildings Europe 2023: beyond disciplinary boundaries, Red Hook, NY: Curran Associates, Inc., 2023, Vol. 2, p. 923-929Conference paper (Refereed)
    Abstract [en]

    Polyurethane (PU) is an ideal thermal insulation material due to its excellent thermal properties. The incorporation of Phase Change Materials (PCMs) capsules into Polyurethane (PU) has been shown to be effective in building envelopes. This design can significantly increase the stability of the indoor thermal environment and reduce the fluctuation of indoor air temperature. We develop a multiscale model of a PU-PCM foam composite and study the thermal conductivity of this material. Later, the design of materials can be optimized by obtaining thermal conductivity. We conduct a case study based on the performance of this optimized material to fully consider the thermal comfort of the occupants of a building envelope with the application of PU-PCMs composites in a single room. At the same time, we also predict the energy consumption of this case. All the outcomes show that this design is promising, enabling the passive design of building energy and significantly improving occupants' comfort.

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  • 27.
    Lundberg, John
    et al.
    Umeå University, Faculty of Science and Technology, Department of Mathematics and Mathematical Statistics.
    Blomström, Victoria
    Umeå University, Faculty of Science and Technology, Department of Mathematics and Mathematical Statistics.
    Produktionsplanering och lagernivåer: En undersökning gällande utjämnad produktion på Jonsson & Paulsson Industri AB2016Independent thesis Advanced level (degree of Master (Two Years)), 300 HE creditsStudent thesis
    Abstract [en]

    Jonsson & Paulsson Industri AB (JP) is a company located in Östersund that manufactures steel-based sub-systems and products. JP is facing a large project that aims to reduce the lead time, reduce the factory floor area and improve their delivery dependability. The master thesis is a subproject of this project with the main objective to eventually raise the company’s delivery dependability by investigating alternative methods to plan JP’s production.  

    The project group’s assignment was to investigate and present proposals for a production plan that was both rate based and leveled, with respect to inventory levels and tied up capital. The purpose of the production plan was to reduce the variation in the flow of the articles. It also increases the possibility of direct feedback concerning whether they follow the production plan of the day or not. The project group also made a sensitivity analysis of the production schedules with the purpose to evaluate which machines and schedules that are most sensitive for disruptions.  Appropriate levels of safety stock were also investigated, so that JP could improve their ability to meet forecasting errors and disruptions in the production. 

    By formulating a mathematical model, and implement it in an integer linear programming solver we were able to produce production schedules. The project group then analyzed the sensitivity of these schedules based on their robustness and sensitivity to reduction in capacity. The sensitivity analyses produced different proposals for improvements. The project group collected data of forecasting errors to determine levels for the safety stock. We chose not to proceed with the simulation of multiple reasons. One of them was insufficient data. We therefore recommend JP to collect the missing data that is required for determine the levels of the safety stock, to be able to do this in the future.  

    The project group has developed three different types of production schedules for most welding machines that are leveled and rate based. We have also developed a type of production schedule that is not leveled or rate based, which has been used as a reference. The leveled production schedules are rate based with a weekly production rate. Two of the leveled types of production schedules are a combination of flexible and completely leveled, as they respond to trends in demand to avoid building excessive inventory levels. The third type of leveled production schedule is leveled with respect to batch sizes. JP is likely to improve their delivery dependability if they level and rate base their flows. It helps them to see if the production is in time and act quickly if it is not. The employees’ gets to produce in a more even working pace and knows what is expected to be produced every day. A leveled flow builds higher inventory levels then a flexible production, but costs are also saved since overtime and underemployment is avoided.

    The sensitivity analyses showed that welding machine 304, 302 and 305 are most sensitive to disruptions. Welding machine 303 and 307 can dispose capacity for other, more pressed, welding machines since they are least sensitive. By heightening the gross capacity of welding machine 303, 304, 305 and 307 their sensitivity will be reduced. We have seen a need to level the stress of the welding machines, preferably by shifting an article from machine 302 to 303 or 307. 

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    Examensarbete John och Victoria
  • 28.
    Lundin, Anders
    et al.
    AL Innemiljö, Handen, Sweden.
    Ekberg, Lars
    Chalmers, CIT Energy Management, Göteborg, Sweden.
    Emenius, Gunnel
    Karolinska Institutet, Stockholm, Sweden.
    Grantén, Jörgen
    FuktCom, Lund, Sweden.
    Iisakka, Lasse
    Byggmiljögruppen, Stockholm, Sweden.
    Kristensson, Jan
    Chemik Lab, Norrtälje, Sweden.
    Stenberg, Berndt
    Umeå University. Västerbottens läns landsting, Umeå, Sweden.
    Wierzbicka, Aneta
    Ergonomics and Aerosol Technology, Lund University (LU), Lund, Sweden.
    The SWESIAQ model - a systematic method for indoor environment investigations2017In: Healthy Buildings Europe 2017, International Society of Indoor Air Quality and Climate , 2017, Vol. 1, p. 306-307Conference paper (Refereed)
  • 29. Milosavljevic, Stephan
    et al.
    Bergman, Frida
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Physiotherapy.
    Rehn, Börje
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Physiotherapy.
    Carman, Allan B
    All-terrain vehicle use in agriculture: Exposure to whole body vibration and mechanical shock2010In: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126, Vol. 41, no 4, p. 530-535Article in journal (Refereed)
    Abstract [en]

    Whole body vibration (WBV) and mechanical shock were measured in 12 New Zealand farmers during their daily use of all-terrain vehicles (ATVs). As per the International Organization for Standardization (ISO) guidelines for WBV exposure, frequencies between 0 and 100Hz were recorded via a seat-pad tri-axial accelerometer during 20min of ATV use. The farmers were also surveyed to estimate seasonal variation in daily ATV usage as well as 7-day and 12-month prevalence of spinal pain. Frequency-weighted vibration exposure and total riding time were calculated to determine the daily vibration dose value (VDV). The daily VDV of 16.6m/s(1.75) was in excess of the 9.1m/s(1.75) action limit set by ISO guidelines suggesting an increased risk of low back injury from such exposure. However, the mean shock factor R, representing cumulative adverse health effects, was 0.31 indicating that these farmers were not exposed to excessive doses of mechanical shock. Extrapolation of daily VDV data to estimated seasonal variations of farmers in ATV riding time demonstrated that all participants would exceed the ISO recommended maximum permissible limits during the spring lambing season, as compared to lower exposures calculated for summer, autumn and winter. Low back pain was the most commonly reported complaint for both 7 day (50%) and 12 month prevalence (67%), followed by the neck (17% and 42%) and the upper back (17% and 25%) respectively. The results demonstrate high levels of vibration exposure within New Zealand farmers and practical recommendations are needed to reduce their exposure to WBV.

  • 30.
    Muhic, Mirella
    et al.
    Umeå University, Faculty of Social Sciences, Department of Informatics.
    Bengtsson, Lars
    Division of Innovation Engineering Department of Design Sciences Faculty of Engineering LTH, Lund University PO Box 118, Lund, Sweden.
    Holmström, Jonny
    Umeå University, Faculty of Social Sciences, Department of Informatics.
    Barriers to continuance use of cloud computing: evidence from two case studies2023In: Information & Management, ISSN 0378-7206, E-ISSN 1872-7530, Vol. 60, no 5, article id 103792Article in journal (Refereed)
    Abstract [en]

    Continuous use of cloud computing and cloud sourcing has received limited research attention compared to cloud adoption. There are indications that cloud sourcing benefits are not easy to reap in continuous use for companies, calling for more research on the continuance use of cloud computing. The current study is one of the first studies of the continuance use of cloud computing processes at the organizational level, contributing to the management and business research literature on cloud computing. In particular, the present study has contributed with two case studies verifying the existence of barriers and more importantly identifying an additional type of barrier: management process barriers (MP), i.e., lack of objectives and strategies for cloud sourcing and lack of organizing cloud vendor communication. Overcoming or reducing management process barriers guides the continuance use of cloud computing process in a strategic direction for the company and enables cloud-related innovation. As a contribution, our research builds on and extends extant research by providing a TOMPE framework of barriers to the continuance use of cloud computing (based and modified from the technology–organization–environment (TOE) framework, by complementing it with the identified management process barriers).

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  • 31.
    Nordgren, Roger
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Systemförluster och kapacitet i grundlacksprocessen2013Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Volvo Trucks in Umea have equipment for truck cabin handling with unidentified losses and varying capacity in the priming process. It is necessary to know the losses in the priming process to be able to optimize it effectively. The equipment studied are two elevators and one transport carrier. All three are automatic controlled and handle truck cabins from exit of the cooling zone after primer to KOB-buffer before top coating.

    The thesis assignments are to identify losses, calculate capacity for the equipment, and make propositions in order to minimize or eliminate losses in the process. In the implementation, the existing painting process has been studied. Literature studies of lean production and Volvo Production System have also been conducted to simplify the work.

    During the work a time study was made and compiled to identify losses and calculate the capacity of the equipment. This resulted in different propositions, which eliminates some, and minimizes other identified losses.

    Unnecessary handling of cabins for elevator HE 138 can be reduced by change the priority in the PLC program. Another alternative is to have different brake times to keep a constant flow of cabins at the control station. If the signal to the transport carriage TC 40 is changed from the transmitter that is used today, to the finish button in the control station, 13 seconds can be eliminated. A reduction of 12 seconds for TC 174, when the cabin enters KOB-buffer, should be possible to eliminate by adjusting the PLC program. The different propositions need investments in order to be realized.

    Today transport carriage TC 174 restricts the capacity of the plant. Therefore it needs improvement to been able to handle more cabins.

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    Systemförluster i grundlacksprocessen
  • 32.
    Ohlsson, Philip
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Effektivisering av produktionsprocessen på en midjesändare2023Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Åkerströms Björbo AB is a company that was founded 1918, offering safe and costumized solutions in radio control. Åkerströms conducts marketing, development, production and service of their products and services.  To keep up with the developments in the industry and remain competitive a company needs to constantly aim for improvement. The purpose of this project is to help Åkerströms to achieve a more effective production process and present solution proposals with focus on the product MC11. MC11 is a waist held transmitter used in applications where safety is critical, such as cranes, port equipment and machinery.  The work is based on using Lean production, Kaizen, 5s-method and Design for Assembly. The theory helped to present improvements for storage, assembly and the product itself. The main purpose was to minimize waste of  time and resources.  The results show that all the proposed solutions were theoretically more efficient than the current production process. Theoretical calculations were made to estimate the time and money that could be saved. The improvements for the warehouse/storage  would result in a time saving of 6.05 hours per year. The assembly efficiency led to standardized workbenches that facilitate identifying sources of time and resource waste. The proposed product modification would provide around 5.5 hours of time saving per year. 

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  • 33.
    Olofsson, Emil
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Produktionsoptimering av boggie-H vid Vimek2022Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Vimek is a manufacturer of compact forest machines. The forest machines are often used in permanent thinning, but also other tasks on forest properties, such as retrieving wind traps, snow breaks or for the maintenance of ditches. During Vimek's development project Vimek Next generation, they have developed a unique bogie-H for an 8-wheeled forwarder. 

    This thesis has been carried out with the aim to prepare realistic proposals for production optimization of a bogie-H that can be implemented in the short term. The goal was to eliminate quality and work environment risks at an early stage and to achieve a good productivity. The tools used during the project were lean manufacturing, 5S and kaizen, which, together with the analyses to map the current situation, provided the basis for obtaining implementable proposals. The developed proposals will contribute to reducing the assembly time, production costs and improve the working environment for the assembly worker. Some of the proposals that have been developed have been the design of an assembly trolley, design optimization of the drive hub and an alternative way of sealing threads. 

    In conclusion, the purpose of the project has been fulfilled, as it resulted in improvement proposals that entail a yearly time saving of 201 hours and 20 minutes, as well as cost saving of 488 959 SEK per year. It is recommended that the improvement work continues even after the completion of the current project.

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    Produktionsoptimering av boggie-H vid Vimek av Olofsson Emil
  • 34.
    Olsson, Oscar
    Umeå University, Faculty of Science and Technology, Umeå Institute of Design.
    SC Vega: Den fjärrstyrda räddningsfarkosten2021Independent thesis Basic level (degree of Bachelor of Fine Arts), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Swedish Sea Rescue Society (SSRS) is a voluntary organization that is responsible for the majority of all sea rescue missions in Sweden. In the past year, the organization has received an increased number of mission as a result of, among other things, more Swedes choosing to celebrate summers at home in Sweden.My thesis revolves around how to use modern technology in order to design a remotely controlled rescue vessel that can facilitate the Swedish Sea Rescue Society during less urgent missions, so-called membership missions, or preventive rescue missions as they are also called. These missions make up the majority of the organizations missions. The project has been carried out in collaboration with the Swedish Sea Rescue Society and has followed a classic design methodology based on research and interviews with people who touch on the chosen problem area, in order to give the project a relevant and solid foundation.

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    Oscar Olsson SC Vega Rapport 2021
  • 35.
    Ringblom, Lisa
    et al.
    Luleå tekniska universitet, Människa och teknik.
    Johansson, Maria
    Luleå tekniska universitet, Människa och teknik.
    Who needs to be “more equal” and why?: Doing gender equality in male-dominated industries2020In: Equality, Diversity and Inclusion, ISSN 2040-7149, E-ISSN 2040-7157, Vol. 39, no 4, p. 337-353Article in journal (Refereed)
    Abstract [en]

    Purpose

    This study aims to deepen the understanding of inequality regimes in male-dominated industries, specifically in Swedish forestry and mining, by exploring how conceptions of gender, class and place are articulated and intertwined when doing gender equality in these organizations.

    Design/methodology/approach

    The article draws on empirical material from four research and development projects inspired by a feminist action research methodology.

    Findings

    This paper shows how gender equality works in these male-dominated organizations simultaneously constructing gender, class and place. When men are at the focal point of gender equality, our empirical findings suggest that blue-collar workers in rural areas are described as “being the problem” for gender inequality in these organizations. Addressing specific groups such as women or blue-collar workers in rural areas is not enough to challenge the inequality regimes that exist in these organizations, since a unilateral focus on certain groups leads to skewed problem formulations.

    Originality/value

    Research on gender equality work and its relation to intersectionality in male-dominated industries is limited, and by focusing on men and masculinities, this paper contributes to knowledge concerning gender equality in male-dominated industrial organizations.

  • 36.
    Sabahno, Hamed
    Industrial Engineering Department, National Iranian Oil Refining and Distribution Company (NIORDC), Tehran, Iran.
    Optimal Policy for a Deteriorating Inventory Model with Finite Replenishment Rate and with Price Dependant Demand Rate and Cycle Length Dependant Price2008In: WCECS 2008: World CongressS on Engineering and Computer Science, The International Association of Engineers (IAENG) , 2008, p. 1053-1057Conference paper (Refereed)
  • 37.
    Sandström, Johan
    Umeå University, Faculty of Social Sciences, Business Administration.
    Green issues in product development2001In: Greener manufacturing and operations: from design to delivery and back / [ed] Joseph Sarkis; Roger Kasperson, Routledge, 2001, p. 83-90Chapter in book (Refereed)
  • 38.
    Sandström, Jonathan
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Koncept för materialpresentation till kollaborativ robot2019Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This report is based on a bachelor’s thesis for mechanical engineers at Umeå University, done during the spring of 2019. The thesis is done at the request of and in cooperation with Sanmina SCI-AB in Örnsköldsvik.

     

    The purpose of the project is to develop a concept for material presentation that can feed and present material to a collaborative robot that Sanmina has chosen to purchase. The robot and material presentation solution together are supposed to make up a complete automated solution. Along with this, a preferred suggestion should be presented to the layout of the robot cell.

     

    An additional request from Sanmina was that the chosen concept should be as simple as possible with regards to electronics such as sensors, motors and the like. To explore the ways which the project could proceed, contact was established with an automated solution company. With recommendations from an expert in the field, the finalized concept could be created.

     

    The chosen solution uses gravity to move trays with material down a slope, towards the robot. The sloped surfaces length allows them to function as storage for additional material trays, increasing the time between restocking of material. Additionally, to maximize the amount of different materials each robot can use, the solution can utilize different levels. With more than one level stacked upon the other, the robot can move the material presentation surface to access trays below.

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  • 39.
    Sarkki, Simo
    et al.
    Umeå University, Faculty of Arts, Várdduo – Centre for Sámi Research. Cultural Anthropology, University of Oulu, Oulu, Finland.
    Rasmus, Sirpa
    Landauer, Mia
    Lépy, Élise
    Heikkinen, Hannu, I.
    Matching societal knowledge demand, research funding and scientific knowledge supply: trends and co-creation dynamics around reindeer management in Finland2021In: Polar Geography, ISSN 1088-937X, E-ISSN 1939-0513, Vol. 44, no 2, p. 90-111Article in journal (Refereed)
    Abstract [en]

    Matching knowledge Demand, research Funding and knowledge Supply (DFS) is important in order to enhance societally and policy relevant research, target funding appropriately and enhance the connectivity between science, policy and society. The DFS field around reindeer management in Finland offers a fertile case study to examine interconnected and complex trends as well as the relations between herders' and policymakers' knowledge demand, ministerial funding and independent supply of knowledge by science. We identify matches and mismatches between the DFS in a case study of reindeer management in Finland across ten inductively identified themes and in time scales of 2000-2009 and 2010-2018. The main finding was that, during the latter period, the DFS matched significantly better than in the earlier period. In order to explain this, we identify and discuss five alternative and legitimate co-creation dynamics that explain how the DFS is organizing around the reindeer management in Finland. The five dynamics represent variations in the co-creation approach, fit to varying situations, which can inform of alternative ways to better match the DFS around reindeer management, and they are also applicable in other contexts.

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  • 40. Skandfer, Morten
    et al.
    Talykova, Ljudmila
    Brenn, Tormod
    Nilsson, Tohr
    Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Occupational and Environmental Medicine.
    Vaktskjold, Arild
    Low back pain among mineworkers in relation to driving, cold environment and ergonomics2014In: Ergonomics, ISSN 0014-0139, E-ISSN 1366-5847, Vol. 57, no 10, p. 1541-1548Article in journal (Refereed)
    Abstract [en]

    Objectives: We aimed to study the association between low back pain (LBP) and exposure to low temperature, wet clothes, heavy lifting and jobs that involve whole body vibration (WBV) in a population of miners. Methods: Health and personal data were collected in a population study by a questionnaire. A total of 3530 workers from four mines participated in the study. Results: 51% of the workers reported LBP within the last 12 months. The adjusted odds ratio for LBP was above unity for working with wet clothes (1.82), working in cold conditions (1.52), lifting heavy (1.54), having worked as a driver previously (1.79) and driving Toro400 (2.61) or train (1.69). Conclusion: Wet clothing, cold working conditions, heavy lifting, previous work as a driver and driving certain vehicles were associated with LBP, but vehicles with WBV levels above action value were not. For better prevention of LBP, improved cabin conditions and clothing should be emphasised. Practitioner Summary: To address risk factors for low back pain (LBP) in miners, a population study measured exposures and LBP. Cold work conditions, wet clothes and awkward postures appeared to be more strongly associated with LBP than exposure to whole body vibration from driving heavy vehicles. Prevention strategies must focus more on clothing and ergonomics.

  • 41. Stein, G.J.
    et al.
    Zahoranský, R
    Gunston, T.P.
    Burström, Lage
    Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Occupational and Environmental Medicine.
    Meyer, L
    Modelling and simulation of a fore-and-aft driver’s seat suspension system with road excitation2008In: International Journal of Industrial Ergonomics, ISSN 0169-8141, E-ISSN 1872-8219, Vol. 38, no 5-6, p. 396-409Article in journal (Refereed)
    Abstract [en]

    This paper describes a simplified simulation of two configurations of the fore-and-aft seat suspension system. A fore-and-aft suspension system model was proposed based on the laboratory measurements of the seat vibration isolation performance. Friction was identified as an important parameter, so different approaches to simulating the suspension friction were investigated. Predicted seat vibration mitigation properties were compared with those measured in the laboratory in response to the recordings of the fore-and-aft vibration measured at the base of the driver's seat in an on-road tractor-trailer combination (articulated truck). Optimisation of the suspension elements parameters was then performed to identify the maximum attainable attenuation. A solution incorporating supercritical suspension damping predicted to give an improvement of the order of 10% in the x-direction mitigation properties as compared to a fixed (locked) horizontal suspension system.

    Relevance to the industry: Simulations conducted in this study are of use to seat manufacturers in developing the fore-and-aft seat suspension systems with improved vibration mitigation properties and for predicting its dynamic performance. The optimisation study shows the attainable vibration mitigation limits for a horizontal suspension system.

  • 42.
    Stenlund, Martin
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Materialhantering för tvärjärn till band för skogsmaskiner från Olofsfors AB2021Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Olofsfors AB is producing tracks and chains for rubber tired forest machines. The company wants to implement a new sort of profile for their wheel tracks. The problem is that the new profile has the same width as the conveyor rolls in the machine. The conveyor rolls must be wider than the cross member on both sides. This prevents the cross meber from tilting and to secure that it´s going straight and centered through the entire line. The project is focusing on a possibility to change the conveyor rolls for the company wheel track lines or see if there is a solution to change the entire line to solve the problem. 

    The method that has been used to solve the problem was to do a current situation analysis, interviews, and research if there was any earlier project about this. Two potential solutions were presented. The most promising solution seems to be the implementation of a slide rail in the beginning of the line instead of conveyor rolls. Behind the oven that heats the cross member, two separate spray nozzles for surface treatment are constructed, where one is for the more narrow cross member, and the other is for wider cross member. The benefit of using two separate spray surface treatment is the optimization of spray surface treatment on the different profiles that are produced more efficiently. However, the work shows that it is also possible to produce the new tracks using the exiting conveyor rolls.

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    Examensarbete vt-21
  • 43.
    Stenman, Hampus
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Kartläggning av slutmonteringen på Rototilt: Möjligheter till effektivisering2022Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The company Rototilt in Vindeln manufactures tiltrotators in different sizes and with varying functions to facilitate work with heavy machinery. The tiltrotators consist of various parts and are built together in the Final Assembly department. They run along the same line, through several stations consisting of varying work steps, where each station has a certain tact time to follow. 

    Currently, however, the assembly time at the stations can vary significantly, which means that the tact time is not kept and bottlenecks are created that make it difficult to sustain an efficient and stable process flow. Therefore, the project was about evaluating the assembly process, finding the bottlenecks and to provide suggestions for improvements.

    By examining the assembly process, interviewing the fitters and measuring the assembly times at the stations, problem areas were isolated to be investigated in more detail.

    The work has been carried out with the main concepts from the quality system Lean in mind, which is a method developed to streamline work that often occurs in industrial contexts.

    Delivery problems caused an unstable production flow during the time studies, which thus had to be canceled. The work then focused on the OP300 station and the QuickChange configurations. These turned out to take up to six times longer to assemble than configurations without QuickChange. By performing certain operations in advance elsewhere, the assembly time could be reduced by up to 48%.

    The conclusion is that there are many factors that can create bottlenecks. Improvements could be achieved by decreasing the number of tiltrotator models, more detailed assembly instructions, an optimized warehousing system, and the development of a better logging function in Binar.

  • 44.
    Svensson, Robert
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Digitalisering av avrapportering i produktion vid BAE Systems AB2022Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    BAE Systems Hägglunds in Ornsköldsvik is an engineering company that producesoff-road and combat vehicles for military and civilian purposes and sees a need fordigital transformation and streamlining of production in order to maintain contractualdelivery times and be an employer of the future.

    The purpose of this thesis was to investigate a way to facilitate and streamline theorder card handling of a laser machine at the manufacturing site in Örnsköldsvik,where the reporting of orders is expected to become a bottleneck in production.The company’s believe in the future importance of digital transformation also wasa significant factor leading to the current work.

    As of today, order card handling in production is performed manually with physicaldocuments and drawings that follow through the production lines, from article toarticle, from cut-out raw material to finished detail. In this work, a concept hasbeen created, which simplifies the documentation of the production.

    The final concept meets the requirement for simpler reporting by (1) using a QuickResponse (QR) code and (2) by inserting an image of the article produced on theproduction card, thereby providing an overview of the articles that are simultaneouslycut in the laser machine. The QR-code is linked to additional reporting in thebusiness system for each work center, which, thus, constitutes a first step towardsdigital order cards in production.

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  • 45.
    Tetzlaff, Johan
    et al.
    Lawson Software.
    Holmström, Jonny
    Umeå University, Faculty of Social Sciences, Department of Informatics.
    Organizational effects of information technology: investigating information technology use in the context of lean manufacturing2010In: Industrial informatics design, use and innovation: perspectives and services / [ed] Jonny Holmström; Mikael Wiberg; Andreas Lund, IGI Global, 2010, p. 157-173Chapter in book (Refereed)
    Abstract [en]

    The aim of this chapter is to better understand the enabling and inhibiting impacts IT has on lean manufacturing. This chapter provides a rich picture of a paper mill producing liner reels and the impact of a reel administration system on the manufacturing process. It is important that an IT tool supporting lean manufacturing reflects its organization. When it does the IT tool can act as an enabler of organizational change that in turn increase productivity and the production quality, when it fails to do so it inhibits organizational change and hampers the quality of production. The conclusion is that framing the definition of high production quality regarding product and process is important and that teambuilding would be a contribution to this end by enhancing perspective taking among the employees.

  • 46.
    Tillberg, Erik
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Design av slaggtransportör för pulversvets2020Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Cranab AB in Vindeln designs and manufactures products for forestry and road clearing, including cranes and tongs. On behalf of Cranab, a concept for a novel type of transpor-ter for slag and powder from powder welding machine was developed.

    The purpose of this project was to find a simple, cost-effective and robust solution forthe design of the transporter that will be assembled at Cranabs new powder weld. Thestructure must be able to transport slag and powder at very high temperatures, and fitwithin a limited space. The product should also enable separation of slag and powderduring transport to simplify the reuse of powder and to deposit the slag. The structurehas to be very simple so that Cranab will be able to repair the transporter if there is toomuch wear.

    To succeed with this aim, there have been brainstorming sessions and repeated discus-sions with supervisors at Cranab AB. After deciding on the concept, the transporterwas drawn in a CAD-program called Inventor, so that the product could be placed in avirtual workshop environment.

    The result from this project is a concept of a slag transporter that fulfills the demands setby Cranab, including the requirement to withstand high temperatures and large strains.The concept is based on slag and powder falling down on a plate, which then transportsboth towards a separation unit that makes use of a perforated plate. Following the se-paration, slag and powder are transported to separate containers to be deposited andreused, respectively.

    In conclusion, it was possible to design a slag transporter that fulfills the demands setup by Cranab AB and is ready for production.

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    Examensarbete vt-20
  • 47.
    Vyhmeister, Eduardo
    et al.
    Insight Centre of Data Analytics, University College Cork, Cork, Ireland.
    Castane, Gabriel G.
    Insight Centre of Data Analytics, University College Cork, Cork, Ireland.
    Buchholz, Johan
    Universidad Europea Vidrina, Frankfurt, Germany.
    Östberg, Per-Olov
    Umeå University. BiTi Innovations, Umeå, Sweden.
    Lessons learn on responsible AI implementation: the ASSISTANT use case2022In: 10th IFAC Conference on Manufacturing Modelling, Management and Control MIM 2022: Nantes, France, 22-24 June 2022, Elsevier, 2022, p. 377-382Conference paper (Refereed)
    Abstract [en]

    Currently, pioneer companies are working hard to construct applied ethical frameworks in different sectors for using AI components that generate trust in their clients and workforce. However, independent of these few companies, there is still a considerable gap between understanding the impact of using responsible AI components, the implications of the lack of use, and what is currently applied in the industrial sector. Given that industry has shown an increased commitment to incorporating AI components, works focus on broadening the understanding of manufacturing sector stakeholders of what approaches could be considered within AI life-cycle, reducing the gap between principles and actionable requirements, and defining fundamental considerations based on risk management for incorporating, and managing, AI-based on responsible AI are required. In this work, we present a summary of the most suitable approaches that can be used for implementation and the lessons learned from a European Funded project (ASSISTANT).

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  • 48.
    Weideryd, Morgan
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Förbättring av momentet stuvning av frontlastare2019Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This project has been performed at Ålö AB in Brännland. They manufacture front loaders for tractors in their factory in Brännland. In their loading area the front loaders are stacked on their custom built pallets. The package (which isthe stacked front loaders withapallet) is banded with a handheld strapping tool and is then sent through thedischarge portwith a forklift.

    Ålö has not been satisfied with how the stowage (stacking of front loaders) is operated. The task has been to investigate what the problems are at the loading area. A suggested solution with a layout calculation of the cost shall be presented. By observing and interviewing personal at the areaan investigating text has been written where the problems are described. The biggest problem was the ergonomics when the loaders are about tobe banded. The person that is performing the banding haveto both reach up high and sit on their knee which isnot good.Other issueslike unusedfactory floor and stacking problemshave also been considered.

    In the beginning I used brainstorming as a method to quickly come up with and sift away ideas. The loading area was visited repeatedly during the project to get new ideas. After a while an idea could be chosen for continuous work.The idea was of a lift table that was mounted under the floor with the floor level as a neutral position. A forklift should be able to drive over the lift table which can be raised or lowered. Companies with relevant products was identifiedand contacted for further information.

    The final solution is a lift table that is mounted on a cast concrete slab under the floor. It can be raised and lowered 1 m in each direction and has a neutral position by the floor plane.The strapping tool is held up by a spring balance which is mounted in a rail system above the lift table. The combination contributes to good ergonomics since lifts with the arm and bending knees is eliminated. A layout suggestion of the new banding area has been created. An Excel document with the calculated cost has been created that presents all the costs this solution is expected tohave.

    The project will require further workbefore there can be a realization of the suggested solution.Further contactneeds to be established with the most involved suppliers. This project has given me a really good understanding of how the decision process can be during a project at a workplace.

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  • 49.
    Wu, Christy
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Autonomt underhåll av lyftverktyg vid lastarmontering2022Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Total Productive Maintenance (TPM) is an approach with eight sub-aspects, which focuses on maintaining and improving production. Autonomous maintenance (AM) is one of the eight pillars and is a maintenance strategy, where machine operators perform basic maintenance tasks and continuously check their own machines. When working with lifting tools, all components and functions should be checked to minimize the risk for accident. Daily supervision is a legal requirement in many countries, and, in Sweden, it is included in the Swedish Work Environment Authority's regulations AFS 2006: 6, section 30, which states that lifting tools must be maintained and checked daily. It is advisable to carry out a daily inspection at the beginning of each shift.

    Ålö AB lacked routines and guidelines for how the lifting tools used for mounting loaders should be optimally maintained, as well as instructions for the ongoing maintenance of the lifting tools. The purpose of the project was to increase safety in the workplace, prevent ill health and accidents, detect maintenance needs as early as possible, and to increase operators' skills and knowledge of lifting tools. The aim of the project was to produce an instruction for the operators' maintenance of lifting tools on the installation of loaders. The project was carried out through fact-finding, development of various concepts over the process, evaluation of concepts and development of a final concept.

    The specific work routine suggested in the final concept is based on daily inspections must be carried out at various locations in the assembly department. The working method combines analogue documentation of the daily supervision of paper forms with digital post-processing.

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    Autonomt underhåll av lyftverktyg vid lastarmontering
  • 50. Zhou, Ming
    et al.
    Khokarale, Santosh G.
    Umeå University, Faculty of Science and Technology, Department of Chemistry.
    Balsamo, Marco
    Mikkola, Jyri-Pekka
    Umeå University, Faculty of Science and Technology, Department of Chemistry. Industrial Chemistry & Reaction Engineering, Johan Gadollin Process Chemistry Centre, Åbo Akademi University, Åbo-Turku, Finland.
    Hedlund, Jonas
    Oligoamine ionic liquids supported on mesoporous microspheres for CO2 separation with good sorption kinetics and low cost2020In: Journal of CO2 Utilization, ISSN 2212-9820, E-ISSN 2212-9839, Vol. 39, article id 101186Article in journal (Refereed)
    Abstract [en]

    Ionic liquids display good CO2 absorption capacity but poor absorption kinetics and high costs. In the present work, we show that these problems can be solved by impregnating the new low cost ionic liquid pentaethylenehexammonium chloride [PEHA][Cl] and the corresponding amine precursor on a low cost mesoporous microsphere support. Nitrogen adsorption/ desorption, high-resolution SEM and thermogravimetric analysis were employed to analyze the structural and thermal properties of the prepared sorbents. The CO2 adsorption and desorption performance was studied by column experiments and mathematical models were fitted to the data. The results showed that sorbents displayed excellent sorption kinetics and capacity, comparable to the best reports in the literature. In addition, the sorbents could be regenerated and displayed high thermal stability. Finally, the costs of the sorbents developed in the present work is much lower than previously reported sorbents. Therefore this novel supported IL system could be promising for industrial CO2 removal and recovery applications.

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