İki Kısımlı Tarife Kontratı ile Yeşil Endüstri 4.0 Tedarik Zincirinin Koordinasyonu

Yıl 2021, Cilt: 33 Sayı: 4, 556 - 567, 30.12.2021

Peral Toktas-palut

https://doi.org/10.7240/jeps.882661

Öz

Günümüzde çevresel koşulların bozulması nedeniyle, firmaların çevreye duyarlı üretim yapması gittikçe daha fazla önem kazanmaktadır. Bu bilinç tüketicileri de etkilemiş olup, yeşil ürünlere olan talep gün geçtikçe artmaktadır. Endüstri 4.0 teknolojilerinin de çevreye olumlu etkilerinin olduğu öngörülmektedir. Bu çalışma, Endüstri 4.0 teknolojileri uygulayan ve çevreye duyarlı bir pazara hizmet eden, iki aşamalı yeşil bir tedarik zincirinin koordinasyonunu ele almaktadır. Üreticinin Endüstri 4.0 yatırım miktarı, maliyetini ve yeşillik seviyesini etkilemektedir. Perakendeci de yeşillik seviyesini arttırmak için yatırım yapmaktadır. Tedarik zincirindeki her bir üyenin sadece kendi sistemini optimize etmeyi amaçladığı merkezkaç sistemde, üreticinin ve perakendecinin yeşillik seviyeleri optimal çözüme oranla daha düşük çıkmaktadır. Ayrıca, üreticinin Endüstri 4.0 yatırım seviyesi, talep ve tedarik zincirinin toplam karı da merkezkaç çözümde daha düşüktür. Bu sonuçlar, tedarik zincirinin koordine edilmesi gerektiğini göstermektedir. Bu amaçla, iki kısımlı tarife (İKT) kontratı geliştirilmiştir. İKT kontratında, üretici ürünleri maliyetine satmakta, perakendeci ise daha sonra üreticiye toplu bir ödeme yapmaktadır. Kontrat sonrasında hem üretici hem de perakendeci rasyonel olarak merkezi çözüm doğrultusunda karar vermektedir. Dolayısıyla, İKT kontratı tedarik zincirinin koordinasyonunu sağlamaktadır. Buna ek olarak, Pareto iyileştiren olmasının yanı sıra, bu kontrat sayesinde üyeler adil bir kar artışından da faydalanabilmektedir. Kontrat öncesi ve sonrası tedarik zincirleri analiz edildiğinde, koordinasyonun tedarik zincirinin ekonomik ve çevresel sürdürülebilirliğini arttırdığı ortaya çıkmaktadır. Ayrıca, tedarik zinciri üyelerinin etkileşim içinde olduğu; üreticinin yeşillik seviyesindeki artışın, perakendecinin de daha fazla yeşillik yatırımı yapmasını sağladığı görülmektedir.

Anahtar Kelimeler

Yeşil tedarik zinciri, Endüstri 4.0, Koordinasyon, Kontrat, Oyun teorisi

Destekleyen Kurum

Doğuş Üniversitesi

Proje Numarası

2019-20-D2-B09

Teşekkür

Bu çalışma, Doğuş Üniversitesi [Bilimsel Araştırma Projesi, Proje Kodu: 2019-20-D2-B09] tarafından desteklenmiştir.

Coordination of a Green Industry 4.0 Supply Chain with a Two-Part Tariff Contract

Öz

Due to the worsening environmental conditions, producing eco-friendly products is gaining more importance. This awareness has also affected the consumers so that green products are demanded more. Industry 4.0 technologies are also expected to have positive effects on the environment. This paper analyzes the coordination of a two-stage green supply chain that applies Industry 4.0 technologies and supplies products to a green-conscious market. The Industry 4.0 investment level of the manufacturer affects her cost and greening level. The retailer also invests in green processes. In the decentralized system, both members determine lower greening levels than the optimal solution. Also, the Industry 4.0 investment level of the manufacturer, demand, and overall supply chain profit are lower in the decentralized solution. These results indicate that the supply chain should be coordinated. Thus, a two-part tariff (TPT) contract is developed. In the TPT contract, the manufacturer sets the unit wholesale price equal to her unit cost, and then the retailer makes a lump-sum payment to the manufacturer. Both members act rationally according to the centralized solution after the contract. Thus, the TPT contract has coordination ability. Also, the contract is Pareto improving and fair so that both members can utilize fair profit increases. The analysis denotes that coordination increases the economic and environmental sustainability of the supply chain. Besides, the supply chain members interact with each other, and an increase in the greening level of the manufacturer also leads to an increase in the greening investment of the retailer.

Anahtar Kelimeler

Green supply chain, Industry 4.0, Coordination, Contract, Game theory

Proje Numarası

2019-20-D2-B09

Kaynakça

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