Abstract
In IT system development, the contents of the result thing ("requirements definition document") of a requirements definition aspect of affairs affecting work of all following aspects of affairs greatly is understanding also by whom Therefore, in completely new systematization and completely new large-scale development of business, after carrying out a requirements definition aspect of affairs first, the method of reestimating the development scale after an external design aspect of affairs may be taken But, if work of this requirements definition aspect of affairs is not carried out correctly, the reliability of the result thing of a requirements definition aspect of affairs will become low, and the result which puts work of a subsequent aspect of affairs out of order greatly will be brought. Recently, there is a case which a problem generates in the requirements definition aspect of affairs of IT system development project of a minor scale. In order to guarantee the quality of a requirements definition aspect of affairs for the problem generated here to a key, it considers what should be carried out as PM.
