Abstract
Earned Value Management System (ibid. EVMS) is one of the important tools for project communication management. Measuring, analyzing and evaluating a project data and to report the result is the basic functions of EVMS, and it is often employed as the condition of a contract in public procurement. EVMS has become an important tool that is used in almost area of project knowledge. But it is not always the practical tool for improving the project management process. Much money and the anguish of project members are required to obtain a project data. Therefore, the obtained data should be utilized to analyze the project status. But there are few previous studies about such theme. In this paper, to get a clue for solving the above mentioned subject, the statistical model of behavior of earned value is provided. The estimator of completion time of project and of earned value that based on the model is proposed.
