There are a great interest in developing and using creativity in our society. We observe that industry and educative centers organize creativity workshops in order to solve problems. Creativity workshops have primordial elements such as creative solvers, creative supporters, and some activities to generate ideas. Their objectives are to apply creativity methods to generate ideas. The ideas generation process is a collaborative process among different activities (ideas creation, clustering, evaluation, etc.) and among participants which have different roles, point of view and experiences. We consider each activity as an organization where participants work together to achieve a common goal which is the idea generation. We propose in this paper to use an organizational approach to model the idea management process from the interaction among the roles during all the creativity activities.