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All Journal JURNAL REKAYASA SISTEM INDUSTRI Jurnal Manajemen dan Teknologi Rekayasa Journal Serambi Engineering (JSE)
Achmad Samudera Dewantara
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Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Identifikasi Potensi Bahaya Pada UKM Tahu dengan Metode Hazard Identification and Risk Assessment Sebagai Langkah Penerapan Manajemen K3 Achmad Samudera Dewantara; Nia Sastra Permata; Sherin Ramadhania
Jurnal Serambi Engineering Vol. 10 No. 2 (2025): April 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

The implementation of Occupational Health and Safety (OHS) management reflects a business owner's commitment to protecting workers' health and safety. One key step in implementing OHS is identifying and mapping potential workplace hazards. In small and medium enterprises (SMEs) producing tofu, such hazards often arise during the production process. The HIRA (Hazard Identification and Risk Assessment) method is used for hazard mapping because it systematically identifies hazard locations and critically analyzes risk levels. This study was conducted at a tofu SME in Krajan, Surakarta, and identified several potential hazards categorized into four groups: hazards from the work environment, production materials, unsafe equipment, and production waste. The analysis revealed five high-risk hazards and four moderate-risk hazards. Through hazard mapping, business owners are expected to take preventive measures to minimize or eliminate exposure to these risks. This ensures worker health and safety while maintaining a smooth and uninterrupted production process.
PREVENTIVE MAINTENANCE MENGGUNAKAN METODE RELIABILITY CENTERED MAINTENANCE II PADA FASILITAS PRODUKSI KRITIS PERUSAHAAN BAJA Ramadhania, Sherin; Dewantara, Achmad Samudra; Permata, Nia Sastra; Suroso, Muhammad Suryo Panotogomo Abi
JURNAL REKAYASA SISTEM INDUSTRI Vol 10 No 2 (2025): Mei 2025
Publisher : Universitas Putera Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33884/jrsi.v10i2.9418

Abstract

One of the largest steel industries in Indonesia produces cold-rolled sheet steel, with production handled by the Cold Rolling Mill Factory. This study focuses on the Continuous Pickling Line and Continuous Tandem Cold Mill units, which have the highest downtime of 230 hours, resulting in a delay cost of 6 billion Rupiah. The objective is to identify the functions, failures, causes, and impacts on critical components, and to propose appropriate maintenance activities and intervals. Failure information is gathered using failure mode and effect analysis (FMEA), while the appropriate maintenance activities are determined using a reliability-centered maintenance II decision worksheet. The study identifies four critical components in the CPL unit and five in the CTCM unit. Five failure modes are addressed by on-condition scheduling, seven by restoration scheduling, and seven by failure interval. Proposed maintenance intervals for on-condition scheduling include 9,413 minutes for stand #5, 8,371 minutes for stand #4, 12,383 minutes for stand #3, 12,996 minutes for stand #2, and 7,123 minutes for stand #1. Restoration scheduling intervals are 34,000 minutes for the saddle breaker, 21,000 minutes for the wiper, and between 12,000–23,000 minutes for other components. Failure interval maintenance for the welder, pickling tank, and stands ranges from 2,409 to 6,540 minutes.
Penentuan Rute Pelayaran Kapal Tramp: Integrasi Kecepatan Optimal, Displacement Kapal, dan Pemilihan Pelabuhan Pangkal Suroso, Muhammad; Sherin Ramadhania; Nia Sastra Permata; Achmad Samudra Dewantara; Dian Fajarika
Jurnal Serambi Engineering Vol. 10 No. 3 (2025): Juli 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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PT XYZ is a shipping company that operates in the ad hoc and short-term contract (spot charter) market. The company faces challenges in selecting the most profitable cargo offers and in managing fuel consumption in order to maximise profits and minimise operational costs. This study aims to develop a mathematical model that optimises revenue through optimal cargo selection, while simultaneously minimising operational costs, including fuel consumption for the main and auxiliary engines. The model is based on the actual conditions of the company's fleet and focuses on tramp general cargo services operating under less-than-shipload (LTS) conditions. In addition to addressing fuel management, the study covers fleet routing, vessel allocation and port docking considerations. The proposed model uses a mixed integer nonlinear programming (MINLP) approach to optimise variables such as sailing speed, ship displacement and the sequence of port visits. Feasibility analysis using real fleet data and hypothetical cargo offers indicates that the model consistently produces viable solutions. Sensitivity analysis of key parameters within a variation range of -50% to +50% from their nominal values confirms that the model's outputs remain within acceptable bounds.
Job Safety Analysis as a Sustainable Solution for Hazard Identification and Control in the Sugarcane Klentek Frame Fabrication Process at PT. XYZ Achmad Samudra Dewantara; Sherin Ramadhania; Nia Sastra Permata; Muhammad Suryo Panatagomo Abi Suroso; Eka Rachmadi Endarta Putra
JUMANTARA: Jurnal Manajemen dan Teknologi Rekayasa Vol 5, No 2 (2026): Juli
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/jumantara.v5i2.3613

Abstract

This study applies Job Safety Analysis (JSA) as a qualitative method to manage occupational safety and health (OSH) risks in the production of the Frame Klentek Tebu component at PT. XYZ, an agricultural machinery company. Despite having existing OSH programs, the company continues to face high-frequency incidents of near-misses and Lost Time Injuries, mainly due to heavy machinery use, welding, and painting. The initial analysis suggests that these accidents are caused by procedural lapses and inadequate hazard identification at the task level. The JSA process involved analyzing key tasks Cutting, Fit-Up, Welding, Primer Painting, and Finishing Painting to identify hazards such as falling materials, electric shock and burns during welding, and chemical inhalation during painting. A significant finding was the non-compliance with Personal Protective Equipment (PPE), largely due to operator habits. The research proposed a control hierarchy, prioritizing Elimination (e.g., chamfering sharp edges, replacing forklifts with automated conveyors) and Engineering Controls (e.g., proper grounding systems, installing barriers). This JSA serves as an essential tool for embedding safety into Standard Operating Procedures (SOPs), ensuring business continuity, and creating a safer work environment at PT. XYZ.
Co-Authors Dian Fajarika, Dian Eka Rachmadi Endarta Putra Muhammad Suryo Panatagomo Abi Suroso Nia Sastra Permata Nia Sastra Permata Sherin Ramadhania Suroso, Muhammad Suroso, Muhammad Suryo Panotogomo Abi