Abstract
Past several years, although research and education on project management have been prevalent, the success rate of IT-related projects of companies and local governments has continued to be around 30%, and cannot rise easily. Some large-scale projects at a cost of more than one billion yen have recently completed in the company the author belongs to. The author acquired reflection and knowledge on the experiences through the task of supporting these projects. We tried to create a guideline and supportive tools from their teachings for the purpose of the prevention of failure recurrence in future projects. Although this approach is premised on the risks peculiar to our company, we consider it can be used generally in other IT-user companies.