Abstract
Risks always exist in projects. But why can we not prcvent risks occurring? That is the reason we cannot plan an effective countermeasure because risks have not defined. In this paper, we present the countermeasure against risks hat we define referring to the software development model. To validate the efficiency of the coumtermeasure, we investigate the failure cases in our projects, and the coverage of the risks. It is obvious that the risks frequently occur and that heavily affect the projects. Furthermore, we present the process wherer we apply the countermeasure to our projects.