Quality assurance starts from the procurement of quality material and resources. For this purpose, we develop close cooperation system with vendors. In April 2009, the company obtained ISO 9001/14001 that laid a foundation of quality/ environment guarantee system. We endeavor to secure quality by process and the quality of finished products is verified by the test report. The production management system developed in January 2015 enables to trace from raw materials to finished goods at real-time basis for customer satisfaction.