Bolt Product Quality Control Using Six Sigma DMAIC Method (Case study: PT XYZ Company)

Abstract

The main purpose of quality control is to increase customer satisfaction. PT XYZ is one of the companies engaged in manufacturing by producing bolt product. In terms of quality control, the company is still getting products that increase customer satisfaction and exceed the company's limits with a defect rate of 13.72%. From the analysis using the DMAIC and FMEA methods, there are 2 (two) dominant types of CTQ bolt products, namely screw defects and bolt head defects. The factors that cause Bolt product damage are: The company's DPMO value is 45,744 and the c value is 3.19, which means that it is still far from the industry level in the world which reaches 6 c (3.4 DPMO). The company's highest Risk Priority Number (RPN) is 265 which is caused by a less than optimal engine condition (dirty dies, shifted dies, and worn dies). Proposals to improve the quality of bolt products using the Six Sigma and FMEA methods for the company, namely check the condition of the machine, and make sure the dies engine is in a proper condition to operate.