Comparison of Harbest and Master Harness Methode For Analyzing Defect Wire Harness Product on Toyota Alphard 812888-XXX

Abstract

PT Sumitomo Wiring System Batam Indonesia was a Japanese company that produced wire harnesses in the automotive world, particularly focusing on quality and quantity issues. Quality problems in customers were the most feared by all parties at PT Sumitomo Wiring System Batam Indonesia. Wire harnesses were a combination of several cables commonly used in vehicles and had a function to deliver electric current and signals to the vehicle. This was very reasonable because if, for example, we bought a wiring harness and it turned out that it was not properly installed with a connector, there was no connection of electric current and the car could not work optimally and could lead to accidents. The wire harness production process did not always run as it should. Problems could arise from machine, human, material, and method factors that could cause defects in the products produced. This study aimed to analyze wire harness defects in one of Toyota's products by visual inspection using the Master Harness and Harness Best Engineering System (HBS) methods. Visual inspection using the Master Harness method was to compare the product with a sample wire harness to ensure that the product or other production results matched the predetermined standards. For the Harness Best Engineering System (HBS) checking method, a wire harness drawing that matched the original size was affixed to the board and then compared with the production wire harness that met the predetermined standards. In this case, Pareto diagrams and fishbone diagrams were used to analyze the resulting data. The results of this study showed a significant decrease in defects from 66 to 30 when using the Master Harness and Harness Best Engineering System (HARBEST) method, which indicated a substantial improvement in the quality of wire harness inspection produced.