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All Journal Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan
Singgih Angga Permana
Universitas Pelita Bangsa
Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Industrial & Manufacturing Engineering Mechanical Engineering

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Analisis Defect Dimensional pada Produk Bracket Battery Kendaraan Listrik Menggunakan Six Sigma DMAIC Singgih Angga Permana; Fibi Eko Putra; Tri Ngudi Wiyatno
Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan Vol. 4 No. 3 (2026): Agustus : Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/globe.v4i3.1732

Abstract

This study aims to analyze dimensional defects in electric vehicle battery bracket products using the Six Sigma method with the DMAIC approach. This descriptive quantitative study utilizes processed or simulated production data from January to August 2025, covering four critical-to-quality characteristics: Hole Position, Diameter, Flatness, and Burr/Deformation. Of 164,500 units produced, 2,125 defect occurrences were identified, resulting in an aggregate defect rate of 1.29%, a DPO of 0.003229, a DPMO of 3,229.48, and a sigma level of 4.22 based on a 1.5-sigma shift. Pareto analysis revealed that Hole Position defects were the most dominant at 40.56%, followed by Diameter at 24.89%, Flatness at 20.19%, and Burr/Deformation at 14.35%. Fishbone and 5 Why analyses identified potential causes, including locator jig wear, inconsistent machine setup, inadequate first-piece approval, and the absence of cycle-based locator lifespan standards. Improvement proposals were developed using 5W+1H and a control plan to support sustainable production process monitoring. As these proposals have not yet been implemented, their effectiveness requires validation through production trials and actual measurements.
Co-Authors Fibi Eko Putra Tri Ngudi Wiyatno