Patient assessment and outcome measurement are essential features of PR for people with chronic respiratory diseases and should minimally include exercise capacity, symptoms and HRQoL. Irrespective of assessment strategy choice, measurement properties such as validity, reliability and responsiveness need to be considered. The availability of MCIDs and normative values facilitates the interpretation of results. A wide range of different assessment methods, tests and tools are available. Notably, many are easy to use, valid, reliable and responsive, and have known cut-off values for clinical relevance. For exercise capacity, both laboratory- and field-based assessment strategies can be used, and specific tests for limb and respiratory muscle function are available. Assessment of symptoms should at least include dyspnoea and fatigue, but additional domains such as anxiety and depression and multiple symptoms tools can broaden patient evaluation. Both generic and disease-specific assessments are recommended and are commonly used within PR to determine the impact of various HRQoL dimensions on the patient.