ERP system became one of the main infrastructures for the organizations and manufacturing industry for the facilities it provides such as the integration between all the organization system which make the control of all the available resource easy, fast and controlled, implementation the ERP system is not an easy issue, many projects has been failed for many reasons; lack of knowledge, Requirements inconsistency, incompleteness and uncertainty, in this paper, a propose for a new method to solve the implementation based on the knowledge base which saves all the knowledge about the ERP system Modules and the new part developed to satisfy customers’ requirements not available in the existing modules.  In the same time, this work proposed a new validation method for the proposed method to ensure its validity.