The purpose of this study was to determine the application of Total Quality. Management using the QC 7 Tools method at PT. XYZ. PT. Koito Indonesia is a company engaged in the manufacturing industry in the manufacture of lighting products. The analytical method used in this study is a quantitative method. PT. XYZ which has a very high Defect Rate in the Molding section. With a high Defect Rate situation in the Molding area it is necessary to reduce the high manufacturing defect so that it can improve the quality of the company measured in a Key Performance Indicator. Waste of defective products that occur in the Molding section is detrimental to the company and reduce the company's performance.