Abstract
The flow of the world improves the speed more and more, and it today that has been complicated. As a result, the demand for the system development was complicated, too and short-term development came to be demanded. Therefore, the system development of a short term with and complex requirement specification project with a difficult adjustment of the old model development technique for developing the application (=water fall type development) after fixing customer's specification has increased. There is Iteration type development as a development technique to lead such a matter to the success. In this text, it introduces the device point on the introduction and the project management of the Iteration type development adopted in the system development project with a difficult fixation of the specification.
