Abstract: In this study, we present a web based simulation groupware. The importance of such a groupware is to allow a users group, geographically and temporally dispersed, to collaborate in all steps of a simulation project. This study is a part of a research project entitled « CSCW and Simulation: Toward a platform of analysis and design of production systems oriented group ». The purpose of the project was to analyze the cooperation practices during the conduct of modeling and simulation project of a production system and then to specify and to develop a modeling and simulation groupware. We validate our approach by an experimental work using a BSCW system to implement such a groupware.