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The building industry in Sweden has for the last five years been under hard pressure to reduce costs, and lead times, while at the same time improving quality. During this period the range of services such as air distribution, heating, cooling and electrical systems has continued to increase, creating more complex buildings. Today, we encounter problems with communication, boundaries between subcontractors, too many people in the same place at the wrong time and too little emphasis on the testing phase. In order to meet customer's expectations, to have a fully functional and tested product at a given time, several main contractors in Sweden have started to use a special subcontract coordinator in an effort to reduce problems. The case study method was used to find out how the subcontract coordinator was working, where in the organisation he should be placed and what he adds to the construction process. Studies have been conducted on several types of building projects, varying organisations and geographically spread projects. The need for the subcontract coordinator is clearly stated among all types of participants. The function adds a more holistic outlook in scheduling, communication, troubleshooting and performance testing before project completion. The aim of this study is to provide a guideline for the coordinator's work. The results can be used to achieve a smoother construction phase with a successful project close-out.