Abstract
Mitsubishi Electric Information Systems Corporation is promoting the process improvement for the purpose of managing the project as planned and providing high quality solutions with which customers are satisfied, and we have achieved maturity level 5 of CMMI in some business groups in March 2006. Now, we are promoting the process improvement for maturity level 4 and 5 in the whole enterprise. In this report, we present the practice of Earned Value Management, the pitfalls with this practice, and the methods to avoid these pitfalls.