M.A. Theses
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Browsing M.A. Theses by Subject "Business logistics."
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Item A decision support system for integrated optimization of production, transportation and pricing decisions in a supply chain(Thesis (M.A.) - Bogazici University. Institute for Graduate Studies in the Social Sciences, 2016., 2016.) İzer, Murat Umut.; Sencer, Aslı.In supply chains, the decisions regarding production, transportation and pricing are often handled separately. In this thesis study, a nonlinear programming model (NLP) is generated to optimize the production, transportation, and pricing decisions in a supply chain where substitute products are produced in multiple factories and sold at several markets. Under the cooperative competition of substitute products, these decisions are given centrally to maximize the total profit. Demands for the substitute products are realized as functions of their prices where the market shares are expressed as market share attraction models from the marketing literature. The NLP model is solved with different parameter settings and sensitivity analysis on the input parameters is made to provide managerial insights. Finally, a decision support system (DSS) is developed to provide an efficient, effective and flexible decision making environment. The DSS includes a relational database for input and output data, a model base that includes the generated NLP model and a graphical user interface that provides interaction between the user, the database, and the solver for the NLP model.Item A simulation based decision support system for supply chain management(Thesis (M.A.)-Bogazici University. Institute for Graduate Studies in Social Sciences, 2006., 2006.) Sancar, Ayşe Ürün.; Erdem, Aslı.This study focuses on the improvement of supply chain performance in one of the biggest commodity product manufacturers in Turkey. The aim is to generate a tool that runs as a Decision Support System (DSS) and procides an easy to use simulation environment for supply chain managers in decision-making. In the current supply chain system there is no demand information flow upwards in the chain and the manufacturer determines its manufacturing rate according to the orders faced in the last thirty days. On the other hand, the manufacturer offers a volume discount option if the orders placed by a distributor exceed a certain quota. In the "Monthly Quota" system, the distributors gain d discount for their unit-purchasing price, if they reach their quota at the end of the evaluation period. As an improvement of the current supply chain system, an information system is proposed to share the Point of Sale data among the members of the supply chain. Another improvement strategy may be applying the "Rolling Horizon" instead of "Monthly Quota" method where the quotas are checked every time a distributor places an order. Three simulation models are developed by using the software ARENA, a graphical user interface that uses MS-Excel as a database is generated and integrated into a DSS for the supply chain managers. The DSS environment is used to compare all three models with different performance measures.