Architecture conception is a difficult and time consuming process, requiring advanced skills from the software architect. The task of an architect consists of providing an architecture that can be evaluated with respect to functional and non functional requirements. The evaluation has a cost, it engages a considerable effort (human and material) and there for is suitable for automation. The goals of our approach are to provide a tool for architecture software analysis and to automate the modifications which result from the evaluation at run time, by using the multi-agents technology. We present in this paper, the platform developed for the evaluation based-scenario. Next, we describe the automated scenarios generation using our platform, and the different process implicated in the maintaining of the required quality. Finally, we indicate the use of this tool in the evaluation process of the architecture and we show a simple application of our tool on Client/Server architecture.