Abstract
The contents of the requirements definition in the project initial stage give a large influence in the following work. There are many cases to develop into the trouble though the work of requirements definition phase is taken seriously. For example, a difference in the recognition toward the requirements definition often occurs, between the customer side and the vendor side, at the system development stage, and also a specifications change, check to entail, sometimes causes release delay or a quality decline. We examine about the occurrence of the recognition difference related to the requirements definition in the customer side and the vendor side in this report, while aiming for the contents of work with requirements definition phase as one of most important subjects for project manager.
