Abstract
To analyze the quality of software, source code review is one of the most effective ways. However, these days implementation of source code review has become very difficult under an offshore project or a rapid Software development. As a result, many bugs remain later half of a project and volumes of test tasks substantially increase. In this report, we show how to reduce test tasks, keeping software quality, by introducing static source code review tools and extemal-staff's source code review. Furthermore, we evaluate effects of these ways.