The use of models to improve the quality of software in the information technology sector in terms of innovation and specialization has become a requirement for small, medium and large enterprises around the world. In Mexico, the Ministry of Economy, respond to calls to several programs. It has invited this sector to facilitate the development and competitiveness of Mexican companies and the attraction of foreign investments. The objective of this work is to describe the experience to implement CMMI-DEV2 model. The SME Miracle Business Network SA de CV, located in the state of Tlaxcala, make a remembrance of what is CMMI origin, evolution, levels; with emphasis on development level 2 that was used to show some artifacts used, highlighting the importance of teamwork in the project called acquisition of property and infrastructure of the microenterprise.