Abstract
Recently, quality management become more important to provide high-quality products and services, under the constraints of cost and delivery time. In this situation, we have developed and applied the Quality Management System Evaluation Method, that assesses both project process rules and those practice level, and provides best practices as process improvement proposals. In this paper, we designed the description method of best practices, and established best practice library. Moreover, we confirmed that the best practice library established makes effective process improvement proposals for business units, as 74% of process improvement proposals proposed are actually accepted by the business units.