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All Journal Jurnal Teknik Industri
Maulana, Sri Kurnia Dwi Budi
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Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Industrial & Manufacturing Engineering

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The Capacitated Sustainable EOQ Models: Models Considering Tax Emissions Maulana, Sri Kurnia Dwi Budi; Utama, Dana Marsetiya; Asrofi, Mochammad Samsul; Ningrum, Inggit Sekar; Alba, Nidaul; Ahfa, Hikam Antasyard; Zein, Thoriq Akbar
Jurnal Teknik Industri Vol 21, No 1 (2020): February
Publisher : Department Industrial Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (390.156 KB) | DOI: 10.22219/JTIUMM.Vol21.No1.12-21

Abstract

The study investigated problems of determining the lot size by considering sustainability and capital constraints for purchasing raw materials and taxes. By using the Sustainable EOQ (SEOQ) models that considered environmental aspects, the researchers also evaluated the capital constraints. The proposed models were used to minimize total inventory costs. In this study, there was a practical numerical analysis and sensitivity analysis to help decision-makers and policies on inventory problems. Finally, the experimental results showed that the proposed models were effectively used to solve the problems.
Game-Theoretic Coordination in a Three-Echelon Vendor Managed Inventory System: A Comparison of Vertical Nash and Stackelberg Games Using the Grey Wolf Optimizer Abdullah , Fakhrina Fahma; Widodo, Erwin; Maulana, Sri Kurnia Dwi Budi
Jurnal Teknik Industri Vol. 27 No. 1 (2026): February
Publisher : Department Industrial Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/JTIUMM.Vol27.No1.63-82

Abstract

This research developed a Vendor Managed Inventory (VMI) model for a three-echelon supply chain consisting of multiple suppliers, one manufacturer, and multiple buyers. The study aimed to optimize total system profit under deterministic demand and industrial constraints. Strategic interactions among actors were modeled using Vertical Nash and Stackelberg game frameworks, and the resulting nonlinear optimization problem was solved using the grey wolf optimizer algorithm. The results indicated that the Vertical Nash game produced higher total profit than the Stackelberg game. Profit distribution reached 6.78% for suppliers, 39.60% for the manufacturer, and 53.62% for buyers under the Vertical Nash game, while the Stackelberg game produced shares of 11.50%, 24.37%, and 64.14%, respectively. These findings demonstrated that decision structure significantly affected system performance and profit allocation in integrated supply chains.
Co-Authors Abdullah , Fakhrina Fahma Ahfa, Hikam Antasyard Alba, Nidaul Asrofi, Mochammad Samsul Dana Marsetya Utama Erwin Widodo Ningrum, Inggit Sekar Zein, Thoriq Akbar