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All Journal Jurnal Teknik Industri : Jurnal Hasil Penelitian dan Karya Ilmiah dalam Bidang Teknik Industri JUSTI (Jurnal Sistem dan Teknik Industri)
Prasetya, Alfadito Noval
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering

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ANALISIS PERANCANGAN USAHA PEMBUATAN PENIRIS MINYAK (SPINNER) SEDERHANA UNTUK UMKM Saputra, Dhimas Indra; Muzakki, Ahmad Syahri; Prasetya, Alfadito Noval; Rohman, Fatchur; Kurniawan, Moh Dian
JUSTI (Jurnal Sistem dan Teknik Industri) Vol 4 No 2 (2023): justi
Publisher : Universitas Muhammadiyah Gresik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30587/justicb.v4i2.7155

Abstract

Indonesian people, especially the lower middle class, often survive by establishing MSMEs or Micro, Small and Medium Enterprises because in building MSMEs (Micro, Small and Medium Enterprises) does not require large capital and can be done in the owner's home, our research aims to ease the burden of capital or business from chip-making business owners on a small or micro scale so that business owners do not spend too much money when buying equipment, Our research focuses on the quality and durability of the products to be sold and the result of our research is to make an oil draining machine (spinner) with small dimensions and at a low price but with quality that is not cheap, after going through various cost analyses, we get a price for the sale of our machine which is Rp. 260,000.00 / unit., with an affordable price, a machine that has been made from foodgrade and powerful to drain the oil in the chips that have been fried
Analyzing Weekly Productivity Dynamics in Steel Fabrication Services Using the Objective Matrix (OMAX) Method Integrated with Root Cause Analysis (Case Study: PT SWA) Prasetya, Alfadito Noval; Ismiyah, Elly
JTI: Jurnal Teknik Industri Vol 11, No 2 (2025): December 2025
Publisher : Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/jti.v11i2.38854

Abstract

PT SWA is a steel fabrication service company operating in the construction sector, where productivity performance plays a critical role in meeting project schedules and cost targets. This study aims to measure weekly productivity levels in the steel fabrication process and to identify the dominant factors contributing to productivity fluctuations. The research employs the Objective Matrix (OMAX) method to quantify productivity performance using selected productivity ratios, which is then integrated with Root Cause Analysis (RCA) to identify the underlying causes of productivity decline. The results reveal significant weekly productivity dynamics during the ten-week observation period. Productivity increased during Weeks 1 and 2, with the highest improvement recorded in Week 2, achieving a productivity index of 190%. However, a continuous decline was observed from Weeks 3 to 10, with the lowest productivity index occurring in Week 8 at −78.33%. The analysis indicates that machine-related disruptions, substandard raw materials, and insufficient operator skills were the primary contributors to low-performing productivity ratios and overall productivity deterioration. The novelty of this study lies in integrating weekly OMAX-based productivity measurement with RCA to provide data-driven, actionable improvement insights within the context of steel fabrication services. The findings offer practical managerial implications, highlighting the importance of preventive maintenance planning, material quality control, and operator competency development to stabilize and improve productivity performance. Keywords: Productivity Measurement, Objective Matrix (OMAX), Root Cause Analysis, Steel Fabrication Services
Co-Authors Elly Ismiyah Fatchur Rohman Kurniawan, Moh Dian Muzakki, Ahmad Syahri Saputra, Dhimas Indra