Model Persediaan Yang Mempertimbangkan Aspek Keberlanjutan Untuk Sistem Rantai Pasok Dengan Permintaan Stokastik

Jauhari, Wakhid Ahmad (2022) Model Persediaan Yang Mempertimbangkan Aspek Keberlanjutan Untuk Sistem Rantai Pasok Dengan Permintaan Stokastik. Doctoral thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Peningkatan pemanasan global telah mendorong semua pihak untuk melakukan upaya guna menekan laju emisi karbon. Salah satu strategi yang dapat diterapkan oleh industri untuk mengurangi emisi adalah dengan mengadopsi green technology. Penelitian ini membahas tentang penentuan kebijakan persediaan pada supply chain yang terdiri dari pemanufaktur dan pengecer yang mempertimbangkan penggunaan hybrid production system. Metode modeling validating process yang terdiri dari empat tahapan yaitu perumusan permasalahan, penyusunan model konseptual, penyusunan model formal dan intepretasi hasil, digunakan untuk mencapai tujuan penelitian. Algoritma pencarian solusi dikembangkan untuk menentukan variabel keputusan model yang dapat mencapai total biaya gabungan minimum. Penelitian ini menghasilkan 4 model persediaan. Model pertama membahas tentang bagaimana penentuan kebijakan persediaan pada supply chain yang mempertimbangkan hybrid production, adjustable production rate dan pajak karbon. Model kedua membahas tentang bagaimana penentuan kebijakan persediaan pada situasi dimana sistem produksi berjalan tidak sempurna. Model ketiga membahas tentang bagaimana penentuan kebijakan produksi dan transmisi pada supply chain listrik. Sedangkan model keempat membahas tentang bagaimana penentuan kebijakan persediaan pada closed-loop supply chain yang mempertimbangkan hybrid production dan insentif pengembalian produk bekas pakai.
Penelitian yang dilakukan menghasilkan 4 kesimpulan penting. Pertama, penggunaan hybrid production pada pemanufaktur yang diikuti dengan penyesuaian alokasi produksi dan kecepatan produksi terbukti mampu memberikan fleksibilitas kepada pengambil keputusan untuk melakukan pengendalian terhadap jumlah emisi yang dihasilkan dan menjaga total biaya gabungan. Kedua, penyesuaian alokasi produksi, kecepatan produksi dan investasi perbaikan kualitas terbukti dapat mengurangi jumlah produk cacat yang dihasilkan dan kondisi out of control. Ketiga, penggunaan hybrid power generation dan kebijakan penyesuaian alokasi produksi listrik dapat digunakan untuk mengendalikan jumlah emisi pada supply chain listrik. Keempat, kebijakan take-back incentive yang diterapkan regulator dan investasi pengembalian produk bekas pakai yang dilakukan pemanufaktur terbukti dapat mendorong pemanufaktur untuk mengumpulkan lebih banyak produk bekas pakai dari pasar sehingga dapat meningkatkan jumlah produk remanufaktur.
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The increase of global warming has encouraged all parties to take appropriate actions to reduce the carbon emissions. One of the best strategies that can be implemented by industries is the adoption of green technology The research focuses on determining inventory decision for the supply chain composed of a manufacturer and a retailer that minimizes the joint total cost. A modelling validating process that consists of four steps, formulating the problem, developing conceptual model, developing formal model and analyzing the results, is employed to achieve the research objective. Furthermore, an algorithm is also developed to find the decision variables that minimizes the joint total cost. This research proposes four mathematical models. First model deals with the problem of how to determine inventory decision in the supply chain that considers hybrid production, adjusted production rate and carbon tax. Second model addresses the issue of how to determine inventory decisions in the situation in which the production process is imperfect. Third model discusses how to determine production and transmission decisions for electrical supply chain under hybrid power generation system. Fourth model focuses on determining inventory decision for a closed-loop supply chain that considers hybrid power generation and take-back incentive.
Some interesting findings are obtained in the research. First, the green technology adoption following with production allocation and production rate adjustments give flexibility to the decision makers to control the emissions resulting from the system as well as maintaining the joint total cost. Second, in the imperfect production case, production allocation and production rate adjustments and quality investment can be used as mechanism to control the defects resulting from the production process and minimizes the out of control condition. Third, the adoption of hybrid power generation and the adjustment of power supply rate can be used to control the emissions and the total cost in the electricity supply chain. Fourth, take-back policy and investment on collection efforts has proven to be able to encourage manufacturer to collect more used products so as to increase the number of remanufactured products.

Item Type:	Thesis (Doctoral)
Uncontrolled Keywords:	Hybrid production, Pajak karbon, Ketidaksempurnaan produksi, Investasi perbaikan kualitas, Closed-loop supply chain, Carbon tax, Imperfect production, Quality investment
Subjects:	H Social Sciences > HD Industries. Land use. Labor > HD38.5 Business logistics--Cost effectiveness. Supply chain management. ERP H Social Sciences > HD Industries. Land use. Labor > HD55 Inventory control
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Industrial Engineering > 26001-(S3) PhD Thesis
Depositing User:	Wakhid Ahmad Jauhari
Date Deposited:	07 Feb 2022 02:39
Last Modified:	07 Feb 2022 02:39
URI:	http://repository.its.ac.id/id/eprint/92901

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