Green Supplier Selection Using GRA and AHP Methods for Sustainability: An Automotive Industry Case Study

Abstract

In recent years, supplier selection has become very important for companies to improve the supply chain with the impact of increasing competition and globalization. It is necessary to determine the right criteria in supplier selection. Natural disasters have increased environmental awareness and developed a life-cycle perspective. Therefore, green criteria play a very critical role in supplier selection for sustainability. In this study, the green supplier selection problem, in which environmental criteria are taken into account along with the classical supplier selection criteria, is discussed. Grey Relational Analysis (GRA) and Analytical Hierarchy Process (AHP), which are multi-criteria decision-making methods, are used to solve this problem. The proposed methods are applied to solve the supplier selection problem in an automotive industry company, and the obtained results are compared. Also, a sensitivity analysis is carried out on different scenarios to assess the effects of the main criteria and decision-makers used in the green supplier selection process. Hence, a useful methodology considering the green criteria is presented to the managers of the automotive industry for selecting the most suitable suppliers.

Keywords

• Green supplier selection
• Grey relational analysis
• Sustainability
• Automotive industry
• Sensitivity analysis
• Analytical hierarchy process

Sürdürülebilirlik için GİA ve AHP Yöntemleri ile Yeşil Tedarikçi Seçimi: Bir Otomotiv Ana Sanayi Uygulaması

Öz

Artan rekabet koşulları ve küreselleşmenin etkisiyle son yıllarda işletmeler için tedarikçi seçim kararı, tedarik zincirlerini geliştirmeleri açısından oldukça önemlidir. Bu karar için, tedarikçi değerlendirme kriterlerinin doğru belirlenmesi ve bu kriterlere göre en uygun tedarikçinin seçilmesi gereklidir. Yaşadığımız doğal felaketler çevre bilincini artırmış ve yaşam döngüsü bakış açısını geliştirmiştir. Bu nedenle sürdürülebilirlik için tedarikçi seçiminde yeşil olma kriteri çok kritik bir rol almaktadır. Bu çalışmada, klasik tedarikçi seçim kriterleri ile birlikte çevresel performans kriterlerininde dikkate alındığı yeşil tedarikçi seçim problemi ele alınmıştır. Bu problemin çözümü için çok kriterli karar verme yöntemlerinden Gri İlişkisel Analiz (GİA) ve Analitik Hiyerarşi Prosesi (AHP) kullanılmıştır. Bir otomotiv ana sanayi işletmesine ait tedarikçi seçimi probleminin çözümü için önerilen yöntemler kullanılmış ve elde edilen sonuçlar karşılaştırılmıştır. Ayrıca yeşil tedarikçi seçim sürecinde kullanılan ana kriterler ve karar vericiler kümesinin değişimindeki etkiyi görmek üzere farklı senaryolar üzerinde duyarlılık analizi gerçekleştirilmiştir. Böylece otomotiv endüstrisi yöneticilerine en uygun tedarikçileri seçebilmelerinde yeşil olma kriterini de içeren yararlı bir metodoloji sunulmuştur.

Anahtar Kelimeler

• Yeşil tedarikçi seçimi
• Gri ilişkisel analiz
• Sürdürülebilirlik
• Otomotiv sektörü
• Duyarlılık Analizi
• Analitik hiyerarşi prosesi
• Duyarlılık analizi

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