Scenarios using the MOA-S model is proposed as a method for discussion and design of the future work organisation of CSCW systems The CSCW technology has the potential to enable a flexible design of the organisation as it can be used for more flexible communication patterns than before. We still have, however, lack of methods for the design process of CSCW systems. A case study is presented of the development and test of a prototype in Lotus Notes for dealing with social insurance matters within the Swedish Social Insurance Board. The focus of the case study is on integration of work organisation aspects into the development process of CSCW systems. Different design of the technology and the organisation could affect the work organisation as well as efficiency and quality aspects.