Through the material requirements planning (MRP) model, the main objective is to offer a more practical, precise and disciplined approach to determine the material requirements of companies, an example is given of how to develop a demand-dependent model, thanks to the help of a computer tool. Creating a database that better supports planning in service companies. Consequently an investigation is made on the different problems that arise, and by means of the MRP models taken as an example those suitable solutions were analyzed that allowed to help to a better control of the different elements implied of a bad planning, reaching to fulfill in the organizations or manufacturing companies to satisfy the needs strategically proposedin the medium term, both those requirements to the customer and the same interest of the organizations.