Abstract
We propose a database of risk patterns, named risk pattern base. We have implemented a risk pattern base with 350 risk patterns of twelve fields. As an application of the risk pattern base, we have developed a tool to support risk identification in a practical class on project-based development. We have also performed an experiment to evaluate the tool and the risk pattern base. As a result, this tool enabled students to identify average 9.7 typical risks and 18.3 untypical risks. This result shows the effectiveness of the risk pattern base.