We are located in the context of the simulation of complex industrial systems and distributed in geographical, decisional and informational term. This paper is divided into two parts. In the first part, we position us within the studying framework of a modeling and specification methodology suggested by (Galland et al. 1999). We briefly expose the problems as well as the considered solutions. In the second part we present general concepts attached to our methodological approach MaMA-S : a simple approach for distributed development and a simulation model life cycle. We finish this part by some explanations on the four major life cycle phases : analysis, specification, conception and implementation.