Sürdürülebilir tedarik zincirlerinin modellenmesi ve analizi

Nowadays many companies started to collect and remanufacture used products to obtain economic and environmental benefits and comply with regulations. Product recovery is not always beneficial to all supply chain actors and appropriate policies are needed to be developed to increase its benefit. This thesis focuses on mainly two research questions. First, in which cases product recovery may be a beneficial option for a specific supply chain actor or for the entire supply chain? Second, how can we develop appropriate policies to maximize the profit of a specific supply chain actor or the profit of the entire supply chain? We investigate these questions in three phases of the thesis. In the first phase, we focus on a collection center which needs to decide on the acquisition fee and dispatching time in order to collect the right amount of used products and maximize its profit. In the second phase, we focus on different remanufacturing systems and investigate in which cases product recovery may be a beneficial option for a specific supply chain actor, i.e. for the manufacturer, remanufacturer or retailer. To this end, we develop policies for them to maximize their own profits. Finally, in the third phase, we focus on the entire supply chain and try to determine in which cases product recovery may be a beneficial option for the entire supply chain. Each phase of the study is supported by comprehensive numerical experiments and sensitivity analyses, which bring significant managerial insights regarding a supply chain actor or the entire supply chain. Keywords: Sustainability, Supply chain management, Product recovery