Robust supplier selection problem, in a scenario-based approach has been proposed, when the demand and exchange rates are subject to uncertainties. First, a deterministic multi-objective mixed integer linear programming is developed; then, the robust counterpart of the proposed mixed integer linear programming is presented using the recent extension in robust optimization theory. We discuss dec...

In the contemporary global market, supplier selection represents a crucial process for enhancing firms’ competitiveness. In firms operating in low-complexity sectors, supplier selection generally leverages on few significant variables (price, delivery time, quality) and it is often left to the buyers’ experience. On the other hand, in industries characterised by remarkable product complexity, s...

Supplier selection problem is an important issue in supply chain management and includes both tangible and intangible factors. Within the effect of the intangible factors, decision making in supplier selection problem includes a high degree of fuzziness and uncertainties in practice. In academic research to handle this uncertainty and vagueness, Fuzzy Set Theory is used as an effective tool. Th...

In this paper, we devise a framework for obtaining the optimal ordering policy in a single location, continuous review inventory system with arbitrary inter-demand times. We show that it is optimal to order at demand arrival epochs only if the inter-demand time has constant or decreasing failure rate (CFR or DFR). When the inter-demand time has increasing failure rate (IFR), we show that the op...

Although information technology (IT) outsourcing is widely applied by companies and has been intensively researched, there has been little scientific research on the differences in singleversus multi-sourcing constellations. Furthermore, linear extension of single-sourcing to multi-sourcing is limited, despite the fact that companies utilize multi-sourcing more frequently in recent times. This ...

A supply chain is a network of entities directly or indirectly interlinked and interdependent in performing activities in moving a product or service from supplier to customer. In recent times, the role of purchasing in supply chain continues to receive growing attention. The supplier selection process is a multi-objectives problem, encompassing many tangible and intangible factors include quan...

‎This paper proposes a multi-supplier multi-product inventory model in which the suppliers have unlimited production capacity, allow delayed payment, and offer either an all-unit or incremental discount. The retailer can delay payment until after they have sold all the units of the purchased product. The retailer’s warehouse is limited, but the surplus can be stored in a rented warehouse at a...

Supplier selection is one of the most important functions of a purchasing department. Since by deciding the best supplier, companies can save material costs and increase competitive advantage. However this decision becomes complicated in case of multiple suppliers, multiple conflicting criteria, and imprecise parameters. In addition the uncertainty and vagueness of the experts’ opinion is the p...

The fundamental objective of supply chain management (SCM) is to integrate various suppliers to satisfy market demand. Supplier evaluation and selection is very important for establishing an effective supply chain. As a matter of fact, supplier selection consists of both qualitative and quantitative criteria, so it is considered as a multi criteria decision making (MCDM) problem. Under incomple...