Abstract
Recently, the development of software products in new domain and the development of software products with new technology are on the increase, and so risk in the software product development project has been increasing. Because of that, the projects that actual costs exceeded scheduled costs have been increasing. I propose the experiment that stakeholders understand the dynamic status of projects as increasing the risk by the reciprocal action of risks among the characteristic factors predicated of projects in the planing stage or the changing stage of the plan.
