This work describes a model for certification ISO 9001:2000 process of a software company. The Quality Management System (QMS) implementation in the company guided the fundamental processes of the software development, the organizational processes and the support processes, structuring all the practices in the company and extending its vision in relation to their own products, processes, collaborators and clients. The certification process was conducted through a set of structured activities based upon ISO/IEC 12207, in contrast to the logical sequence of implementation items in ISO 9001. As a result, this work provided greater agility in the implementation process of the QMS in the software company.