We To solve several types of project management problems, efficient project management is being demanded. Success or failure of the project hangs to the skill of project manager. However in general, it is not easy to make an excellent manager trained quickly. If the knowledge is considered to be a kind of judgment for the effective action, first of all the registration of manager's action and experience is needed. Group of low-level information and data is called knowledge in this paper. It is necessary to register the knowledge easily. But it is difficult to find the timing to register the knowledge. It is difficult to find the time that information should be registered on. This paper describes the method of finding the best timing to have to register the knowledge. I tried to take into the change in progress of the project in order to get the knowledge in addition to the EVM method. EVM (Earned Value Management) is one of the methods for scientific managing the progress of the project. On the other hand, the time that progress changes seem the best timing of registration. As the result, it has been understood that there is a possibility that the knowledge can be registered automatically. It will be necessary to achieve the function to register the knowledge at the just timing in the future.