DAMANIK, GRACIA WIRANATALIE (2026) ANALISIS PEMBOROSAN PADA PROSES EKSTRUSI ALUMINIUM DENGAN LEAN SIX SIGMA DAN FAILURE MODE EFFECT ANALYSIS DI PT UNGGUL REGANTRIS DIGDJOYO GRESIK. Undergraduate thesis, Universitas Pembangunan Nasional "Veteran" Jawa Timur.
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Abstract
PT Unggul Regantris Digdjoyo is a manufacturing enterprise specializing in aluminum extrusion production. Despite its established operations, various forms of waste continue to impede workflow efficiency and the quality of aluminum profile products. This study aims to identify dominant waste types, analyze the root causes of quality failures, and formulate improvement recommendations to enhance production process efficiency. The methodology integrates Lean Six Sigma and Failure Mode and Effect Analysis (FMEA). Identification results reveal that defect is the most critical waste, with the highest weight of 0.1206, followed by waiting at 0.0905 and transportation at 0.0854. Root cause analysis of product defects using fishbone diagrams and FMEA indicates that denting poses the highest risk, with a Risk Priority Number (RPN) of 336. Through the proposed improvement designs, the company can entirely eliminate non-value-added (NVA) activities and significantly reduce necessary non-value-added (NNVA) activities. The implementation of these recommendations successfully reduced the total lead time from 2,435.59 minutes to 1,870.41 minutes, resulting in an increase in the ValueAdded (VA) time percentage from 40.86% to 46.34%.
| Item Type: | Thesis (Undergraduate) | ||||||||
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| Subjects: | T Technology > T Technology (General) > T55.4-60.8 Industrial engineering. Management engineering T Technology > TS Manufactures > TS 155-194 Production Management, Operations Management |
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| Divisions: | Faculty of Engineering > Departement of Industrial Engineering | ||||||||
| Depositing User: | Gracia Wiranatalie Damanik | ||||||||
| Date Deposited: | 25 Feb 2026 07:35 | ||||||||
| Last Modified: | 25 Feb 2026 07:35 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/49824 |
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