Background. The Canadian Occupational Performance Measure (COPM) is an outcome measure designed to assess performance and satisfaction with occupation. It was developed to coincide with the occupation-focused, client-centred Canadian Model of Occupational Performance. Purpose. The COPM has been a feature of the occupational therapy landscape for approximately 15 years and has pervaded the consciousness of occupational therapists around the world. In this paper, we examine issues associated with application of the COPM in targeted clinical and non-clinical situations. Results. The paper suggests considerations required to ensure that the highest quality of information is derived from the COPM in all situations. Practice Implications. Although the paper emphasizes the centrality of the client-centred approach, it also demonstrates the flexibility and adaptability of the COPM to different situations, clients, settings and purposes.