MODEL PERFORMANSI SISTEM SUPPLY CHAIN YANG MELIBATKAN VARIABEL EMISI CARBON

MURDAPA, PETRUS SETYA (2019) MODEL PERFORMANSI SISTEM SUPPLY CHAIN YANG MELIBATKAN VARIABEL EMISI CARBON. Doctoral thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kadar greenhouse gases di atmosfer sudah sangat tinggi, mencapai 406 ppm. Pengurangan emisi karbon saat ini merupakan tanggung jawab supply chain (rantai pasok). Manajemen supply chain berupaya mendapatkan pedoman terbaik untuk mengorganisasikan aktivitas-aktivitas dalam sistem supply chain. Maka, bagaimanakah pertimbangan emisi dan cost memengaruhi keputusan lot-sizing dan inventory buffering pada suatu sistem supply chain? Disertasi ini memandang sistem supply chain sebagai sistem antrian, di mana selama beraktivitas sistem menghasilkan emisi. Oleh karena itu, emisi merupakan variabel respons. Sebagai kajian, digunakan kasus sistem prototipe supply chain mulai dari kasus single stage hingga tiga eselon dengan multi-supplier dan multi-retailer. Model numerik disusun berdasarkan metode dekomposisi. Perhitungan throughput dimulai dari hilir karena sistem digerakkan oleh demand. Eksperimentasi dilakukan untuk melihat profil emission cost dan inventory-related cost sebagai variabel respons. Hasil eksperimen menggunakan model numerik yang disusun menunjukkan bahwa emission cost dan inventory-related cost berada pada fase yang berbeda seiring dengan variasi keputusan lot-sizing. Hal ini menyebabkan perlunya trade-off antara kedua variabel respons tersebut. Emission cost yang jauh lebih kecil daripada inventory-related cost menyebabkan trade-off 1:1 ekuivalen dengan meniadakan pertimbangan emisi dalam pemilihan keputusan. Karena isu emisi semakin penting, diperlukan pemberian bobot yang lebih besar terhadap emisi.
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The level of greenhouse gases in the atmosphere is already very high, reaching 406 ppm. Reducing carbon emissions is currently the responsibility of the supply chain. Supply chain management strives to establish the best guidelines for organizing activities within supply chain systems. Therefore, how do emission and cost considerations affect lot-sizing and inventory-buffering decisions in a supply chain system? This dissertation views the supply chain system as a queuing system in which emissions are generated during its operation. Thus, emissions are considered a response variable. As a case study, several supply chain prototype systems were examined, ranging from a single-stage system to a three-echelon system involving multiple suppliers and retailers. Numerical models were developed using decomposition techniques. Throughput calculations were initiated from the downstream stage because the system is driven by end-consumer demand. Experiments were conducted to examine the profiles of emission costs and inventory-related costs as response variables. The experimental results obtained using the developed numerical model show that emission costs and inventory-related costs exhibit different patterns depending on variations in lot-sizing decisions. This creates a need for a trade-off between the two response variables. Because emission costs are currently much lower than inventory-related costs, a 1:1 trade-off is equivalent to disregarding emissions in the decision-making process. Therefore, as emission issues become increasingly important, greater weight should be assigned to emissions in the decision-making process.

Item Type:	Thesis (Doctoral)
Subjects:	H Social Sciences > HD Industries. Land use. Labor > HD55 Inventory control
Depositing User:	Setya Murdapa
Date Deposited:	22 Jul 2026 08:01
Last Modified:	22 Jul 2026 08:01
URI:	http://repository.its.ac.id/id/eprint/70622

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