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All Journal Industrika : Jurnal Ilmiah Teknik Industri IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA)
Syarif , Abdul Azis
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Automotive Engineering Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Penerapan Metode CPM (Critical Path Method) Pada Proyek Peningkatan Sarana Dan Prasarana TPS Limbah dan Fasilitasnya Di PT. Putra Kuala Tanjung Syahputra, Rahmad; Pasaribu, Muhammad Fazri; Syarif , Abdul Azis
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 3 No 1 (2024): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v3i1.90

Abstract

In construction projects, inaccuracies in planning procedures often lead to failures or delays. Given the importance of timely project completion in the competitive construction service industry, the Critical Path Method (CPM) is recommended for scheduling. This method allows for highly detailed time planning by breaking down the work into small items, enabling accurate duration calculations for each activity. This study focuses on rescheduling the construction of the Preprocessing Building (steel structure) at PT. Putra Kuala Tanjung's project. By breaking down the work and performing forward and backward calculations, the author successfully determined the duration of each activity and identified critical tasks. As a result, the project duration was reduced from 252 working days to 156 days, demonstrating a time savings of 96 days.
Usulan Perbaikan Mutu CPO dengan Metode Six Sigma pada PT. PSU PKS Tanjung Kasau Dachi, Adi Syaputra; Syarif , Abdul Azis; Utama, Denny Walady
Industrika : Jurnal Ilmiah Teknik Industri Vol. 9 No. 3 (2025): Industrika: Jurnal Ilmiah Teknik Industri
Publisher : Fakultas Teknik Universitas Tulang Bawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37090/indstrk.v9i3.2158

Abstract

PT. PSU Tanjung Kasau is one of the BUMD’s of North Sumatra Province in the agricultural sector. The product produced is Crude Palm Oil (CPO). CPO has quality parameters, namely free fatty acid (FFA) content, water content and dirt content. Based on data on the results of CPO production quality in January and February 2024, there are still several quality parameters that exceed the standards set by the company. Therefore, to determine the level of quality, factors that cause a decrease in the CPO level, and proposed improvements, research was carried out using the Six Sigma method with the stages of define, measure, analyze, improve and control (DMAIC). After processing, the CPO DPMO value was obtained of 676,451.85 with a sigma value of 1.04. Then using the Pareto diagram, it was obtained that the water content and free fatty acid content caused a decrease in CPO quality. Then based on the fishbone diagram, the human factor was obtained which was a lack of discipline, the material factor was bad qualityof TBS, and the machine factor was less than optimal machine performance and the method factor was not in accordance with the SOP. Proposed improvements to overcome the problems include conducting training and evaluation, increasing the supply of TBS and improving infrastructure, conducting regular monitoring and maintenance of machines, improving SOP’s and implementing SOP’s so that corporate governance can run well. Keywords : CPO, DMAIC, Quality, Six Sigma 
Co-Authors Dachi, Adi Syaputra Denny Walady Utama Pasaribu, Muhammad Fazri Rahmad Syah Putra