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Rochmoeljati, Raden Roro
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Control & Systems Engineering Decision Sciences, Operations Research & Management Energy Engineering Industrial & Manufacturing Engineering

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Defect Analysis for HDPE Plastic Bag Products Using Seven Tools Method and Improvement Strategy with Kaizen Method at PT. HSKU Erlangga, Muhammad Daffa; Rochmoeljati, Raden Roro
Journal of Industrial Engineering Management Vol 9, No 2 (2024): Journal of Industrial Engineering and Management
Publisher : Center for Study and Journal Management FTI UMI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jiem.v9i2.1713

Abstract

PT. Harapan Sejahtera Karya Utama (HSKU) is a manufacturing company engaged in the production of plastic bags. This company produces various types of plastic bags made from HDPE. One of its superior products is HDPE plastic bags measuring 15x30, with total production from July to December 2022 of 3,072,923 units and a total of 435,670 units of defects. The purpose of this study is to determine the percentage of defects and their causes of defects and to propose quality improvements. This study uses the Seven Tools and Kaizen methods. The results of the study show that the percentage of defects in HDPE plastic bag products measuring 15x30 has the highest defects, namely Hole Defects at 64.76%; Folded Defects at 22.76%; Dirty Defects at 7.45%; and Detached Seal Defects at 5.03%. Proposed improvements are given with the Kaizen method, namely conducting supervision and controlling the five M factors and the five-step plan, namely providing training to improve operator capabilities and refreshments (SOP), applying strict penalties when making mistakes repeatedly, and making machine grouping data. According to the type and function, placing procedure manuals around the machine area, arranging air circulation equipment as needed, and providing storage areas for materials and plastic rolls in a safe and sterile place.
Product Quality Analysis for UGL Train Type 50 FT Using Six Sigma Method & Failure Mode and Effect Analysis at PT. INKA Multi Solusi Cantika, Devani Nendi Aurillia; Rochmoeljati, Raden Roro
Journal of Industrial Engineering Management Vol 9, No 2 (2024): Journal of Industrial Engineering and Management
Publisher : Center for Study and Journal Management FTI UMI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jiem.v9i2.1717

Abstract

PT. INKA Multi Solusi is a subsidiary of PT. Industri Kereta Api is engaged in manufacturing services, manufacture, and trade of spare parts and products for land transportation and the manufacture of railway components according to customer specifications. The product currently being worked on is the type 50 FT flat carriage (UGL) product ordered by the KiwiRail company, Australia, with total production from November 2022 to April 2023 of 791 carriages with a total of 1582 headstock arrangements and a total of 408 units of defects. This study aims to determine product quality and provide suggestions for improving the quality of welding joints for UGL type 50 FT train products. This study uses the Six Sigma method and Failure Mode and Effect Analysis (FMEA). The study result shows that the average Sigma value based on total defects from November 2022 to April 2023 is 3.16, which means that the six sigma target is still unmet. Recommendations for improvements that need to be given are conducting briefings and training for welders so that they are more adept at using the welding machine, cleaning (blasting) the workpiece to remove residual welding impurities, and providing a memo regarding the results of the welding to be given to the next welder.
Co-Authors Cantika, Devani Nendi Aurillia Erlangga, Muhammad Daffa