摘要: The article describes the GEM (GRAI Evolution Method) method, which is dedicated to management of evolution industrial firm. Based on GRAI Enterprise Modelling Techniques, it considers enterprises through various steps elaboration "AS IS", then search "SHOULD BE" (the vision) and determination "NEXT STEP" in frame vision. From this initial modelling, we deduce User Specifications Technical with concepts Future Architecture Multi-management Projects. Then, Realisation, Implementation Operational phases are described. In second part article, application method illustrated presentation an case from European ESPRIT REALMS II project. company represents a Greek aluminium industry.