The training front will initiate the response of the knowledge on the system, through multipliers, employees especially trained to repass its knowledge for its fellow workers, instructors professionals or consultants. Made the tests and training, the company will be apt to plan optimum moment, and to place in practical cut-over, that is, the total stoppage of the current system for substitution for system ERP. One concludes, thus, that the decision of implantation of a system ERP alone must after be taken a detailed analysis of the processes of the company and the functionalities of systems ERP. Moreover, it is very important that the companies consider, since the beginning of the implantation, the impacts that the redefinition of the processes and the introduction of the system will have in the structure, culture and strategy of the organization. The use of system ERP will be able to optimize the flow of information and to facilitate the access to the operational data, favoring the adoption of flattened and flexible organizacionais structures more. However occured imperfections in the stages above will be able to cause great financial damages, and a difficulty of acceptance of the system on the part of employees. Process of Choice of a system ERP the process of choice of systems ERP in the organizations, is initiated with the definition of the products to be used and which partners will participate of the implantation process. For the development of solutions of implantation of the system three types of company must be analyzed: suppliers of software, manufacturers of the hardware and implantadores. The implantation of the ERP follows, generally, a model of partnership between using company, and the excessively supplying ones of the system and equipment of computer science. For a perfect adequacy, they will have to be provided, to the suppliers, data regarding the using company, such as: business branch; knowledge of the organization; knowledge of the suppliers and customers; executive comprometimento; responsibilities for the management of the project.