IDENTIFIKASI PRIORITAS DEFECT DENGAN MENGGUNAKAN METODE FAILURE MODE AND EFFECT ANALYSIS (FMEA) PADA FINAL DRIVE UNIT HD785-7 DI PT XYZ

Abstract

This study aims to determine the priority order of improvements that the company must undertake to minimize defects in the remanufacturing results at PT XYZ, an industry engaged in remanufacturing and assembling heavy equipment components such as engines, transmissions, torque converters, power modules, final drives, and other components. In the remanufacturing process of the Final Drive unit HD785-7 from January to June 2024, 16 frequently occurring failure modes were identified through the completion of a Failure Mode and Effect Analysis (FMEA) questionnaire at PT XYZ. Based on the analysis results, the failure modes categorized as critical failures and prioritized for improvement include abnormal damaged threads with the highest Risk Priority Number (RPN) of 495.6, incorrect physical parts with an RPN of 384, worn-out hole threads with an RPN of 264, abnormal dents on the contact surface with an RPN of 251.1, and unevenly worn threads with an RPN of 204.4. From these five critical failure modes, a priority order for improvement has been established for the company to reduce defect risks in remanufacturing results. The proposed improvements are developed using a fishbone diagram to identify the main causes of critical failure modes, encompassing four main aspects: human, material, machine, and method. With this approach, the company is expected to implement more effective and targeted improvements addressing the root of the issues, thereby enhancing product reliability and reducing the risk of defects in the future.