Abstract
The distinction between the trust contract and undertaking contract is indefinite, and in SI project of the customer in Japan, might it more or less execute as a proxy for the project coordination even if it is originally work of the customer and work be executed in undertaking contract. The idea of the contract in case of such a case and roles with the customer are discussed by the viewpoint of the risk management. In this text, the following two measures practiced in SI project of the customer who is for the consideration of this problem are described. 1) Trust details of contract that provides for third party's roles, 2) Method of contracting SI that contains customer agency work. The result of the profit and loss improvement was achieved to the section as a project manager by executing these measures, it became consequential for the customer for the best system development cost, and customer satisfaction measurement rose.
