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All Journal Jurnal Sosial dan Sains Serambi Engineering
Simbolon, Oky
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Astronomy Earth & Planetary Sciences Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Library & Information Science Physics

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Integrasi Aspek Lingkungan dalam Pemilihan Pemasok: Strategi untuk Keberlanjutan Rantai Pasokan Wahyu Elanda, Redian; Simbolon, Oky; Laymina Ikhsan, Wakhid
Jurnal Serambi Engineering Vol. 10 No. 3 (2025): Juli 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

This research aims to design supplier performance criteria using an environmentally-oriented approach within the context of supply chain management. Amid increasing awareness of environmental issues, companies need to consider the environmental impact when selecting and evaluating suppliers. Through a literature review, this study identifies relevant performance factors and systematically designs evaluation criteria with input from experts. This approach employs multi-criteria analysis to assess environmental aspects of supplier performance, including energy efficiency, emission reduction, waste management, and the use of eco-friendly raw materials. The results indicate that implementing environmentally-oriented criteria can enhance a company's effectiveness in selecting environmentally responsible suppliers. By integrating environmental factors into supplier evaluations, companies can not only mitigate negative environmental impacts but also contribute to sustainable development. These findings provide important guidance for companies in designing evaluation criteria that consider environmental aspects, as well as enhancing the understanding of the significance of sustainable supply chain management. This research is expected to fill gaps in the related literature and promote more responsible business practices.
Efisiensi Pengolahan Persediaan Bearing dengan Metode Economic Order Quantity pada Departemen Gudang di Pt. Xyz Simbolon, Oky; Sanusi, Aceng Ahmad
Jurnal sosial dan sains Vol. 5 No. 9 (2025): Jurnal Sosial dan Sains
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/jurnalsosains.v5i9.32489

Abstract

This research aims to improve the efficiency of bearing spare parts inventory management at PT. XYZ by applying the Economic Order Quantity (EOQ) method. Optimal spare parts availability is crucial to maintaining smooth production processes, reducing machine downtime, and minimizing inventory costs. PT. XYZ frequently faces issues due to inadequate stock, which hinders machine repairs and increases production costs. This study applies the EOQ method to determine the optimal order quantity for spare parts and the ideal ordering frequency to minimize total inventory costs. The results show that using the EOQ method, the optimal order quantity for bearings is 105.15 units, with an order frequency of 5 times per year. Additionally, the recommended safety stock is 5 units, with a reorder point set at 55 units. The implementation of the EOQ method successfully reduced total inventory costs from Rp 509,400 to Rp 378,600, representing a savings of 25.7%. These findings indicate that the EOQ method offers an effective solution to optimizing inventory management at PT. XYZ, improving production efficiency, and significantly lowering operational costs.
Pembobotan Kriteria Evaluasi Kinerja Pemasok dengan Mempertimbangkan Risiko Gangguan Menggunakan Metode Best Worst Method Wahyu Elanda, Redian; Simbolon, Oky; Laymina Ikhsan, Wakhid
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

At PT X, an electronics manufacturer, disruptions caused by natural disasters and social factors have generated additional costs of about 8–10%. This condition underlines the importance of explicitly incorporating risk, especially disruption risk, into supplier evaluation. This study develops and weights supplier evaluation criteria by adding a risk dimension to the traditional dimensions of cost, quality, delivery, and flexibility. The Best Worst Method (BWM) is used to determine criteria weights through pairwise comparisons between the best and worst criteria, requiring fewer comparisons and improving the consistency of expert judgments. Data were obtained from three experienced procurement experts at PT X. The results show that cost and quality are the most influential dimensions, followed by delivery, risk, and flexibility. At the criteria level, product price, product reliability, on-time delivery, and risk-related indicators such as manufacturing capability, problem-solving capability, disaster recovery planning, performance history, and geographical location are relatively dominant. Low consistency values (ξ) indicate acceptable expert consistency. The resulting framework helps firms evaluate suppliers more comprehensively, reduce disruption-related costs, and enhance supply chain reliability.
Co-Authors Laymina Ikhsan, Wakhid Sanusi, Aceng Ahmad Wahyu Elanda, Redian