Abstract
Adequate and reliable methods for evaluation of clients with work disabilities are crucial for both the individuals who are assessed and for society as a whole. Sound and precise work assessments are needed to guide clients to suitable interventions using a minimum of rehabilitation resources [31,46,51,68]. Occupational therapy literature contains evidence that work function assessments are complex and that there is confusion over work assessment concepts [30,31]. Therefore, further development and evaluation of adequate concepts and theoretical models within the area of work assessment is needed [68,74]. This article proposes a conceptual framework for different dimensions of work functioning and points out important factors for work assessment. The concepts proposed and defined in the article are: work functioning, work participation, work performance, and individual capacity.