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All Journal INAQUE: Journal of Industrial & Quality Engineering Jurnal Teknik Industri Terintegrasi (JUTIN)
Januardi Januardi
Universitas Padjadjaran
Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Model Konseptual Pengolahan Sampah Organik di Pasar Induk Gedebage: Pengomposan Windrow dan Pengolahan Anaerobik Menggunakan Biodigester Alya Qothrunada; Devi Maulida Rahmah; Januardi Januardi
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 4 (2026): October
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i4.63157

Abstract

Organic waste management requires an approach that supports resource recovery while considering economic potential and greenhouse gas (GHG) emissions. This study aimed to develop a conceptual system dynamics model for organic waste processing at Gedebage Wholesale Market, using windrow composting as the baseline and anaerobic digestion in a biodigester as an alternative scenario. A qualitative system dynamics approach was applied through literature review, preliminary study, system boundary definition, conceptual model development, variable identification, and Causal Loop Diagram (CLD) construction. The results show that each CLD forms one balancing loop representing the interaction between organic waste accumulation and the rate at which material completes processing. The two pathways differ in treatment process, recovered product, and causal relationships associated with economic potential and GHG emissions. Future studies should extend the model to a Stock and Flow Diagram and quantitative simulation to enable dynamic comparison of the two pathways.
DARI INEFISIENSI KE OPTIMALISASI LINI PRODUKSI INDUSTRI COCOA POWDER MENGGUNAKAN METODE OPC, ARC, DAN LINE BALANCING Regina Diya Azzahra; Royan Dipta Febrian; Wildah Sabila Rodiah; Septirafa Ednira Ramadhiani; Januardi Januardi
Inaque : Journal of Industrial and Quality Engineering Vol 14 No 2 (2026): Inaque Oktober 2026
Publisher : Teknik Industri Unikom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34010/iqe.v14i1.19908

Abstract

The cocoa processing industry plays a strategic role in increasing the added value of agricultural commodities in Indonesia, particularly through cocoa powder production. This study aims to analyze the plant layout and operational processes at PT XY to improve production efficiency using Operation Process Chart (OPC), Activity Relationship Chart (ARC), and line balancing. Data were collected through direct observation, company documentation, and literature review. The results show that the production system is linear, with all activities on the critical path without slack time, and the pressing process as the main bottleneck (approximately 300 kg/hour) limiting capacity. The process-based layout is considered fairly optimal, although integration between quality control (QC) and packaging can be improved. Material efficiency is high (approximately 0.2% loss), while capacity efficiency remains dependent on bottleneck performance.  Keywords: Cocoa agroindustry, plant layout, production line balancing, bottleneck analysis, production efficiency. 
Co-Authors Alya Qothrunada Devi Maulida Rahmah Regina Diya Azzahra Royan Dipta Febrian Septirafa Ednira Ramadhiani Wildah Sabila Rodiah