This paper describes the development and utilization of enterprises games to improve the ability in the decision taking inside manufacturing integration environment. In order to elaborate the game, it has used the MIE?Enterprises Integration Methodology?that offers a wide range of strategic options in respect to the question of integration. Such methodology has been tested and approved inside the FIM?Model Integrated Factory?which is one of the research lines of the CIM Project of the University of Sao Paulo-Sao Carlos.