This paper tries to give a summarized overview on both Enterprise Resource Planning Systems (ERP) and Business Process Management Systems (BPMS) in order to clarify some points as the business values of BPMS comparing with ERPs to the organizations using any of them and showing where each of them excel at and also reviewing the history and Evolution of each of them. Both systems are then examined in order to show the possibilities of cooperation and then opinions are offered to show whether there is a possibility for BPMS to replace ERP or vice versa or using each system separately and deciding on the order of implementation and deployment to the architectural platform or work together in an integrated environment or be integrated as one packaged solution.