After the U.S.A. and the U.K. the Netherlands has recognized Facilities Management as a professional strategy, that coordinates and integrates information and expertise for the purpose of developing and managing facilities to support individual and organizational effectiveness. As part of a F.M. strategy, the planning and design process of office buildings should be based upon the relationships between the work-environment and people's responses to it. Coordination and integration of information requires rating processes of these relationships. Therefore it is necessary to develop appropriate quantitative environmental measures of the impact of the work-environment on the individual performance. As a contribution to the development of these measures, this study will classify key components of the quality of the work environment. In several organizations individual workers estimated the physical environment, building- and furniture systems, ambient conditions, organizational climate and the interpersonal relationships.