Inventory Models With Disruption Risks For Multi-suppliers

With the rapid development of global economic integration and informationtechnology, supply chain emerges as the times require. Business mode changes fromtraditional mode to the mode of supply chain, so supply chain management become aneffective management of modern enterprises. Inventory management is an importantpart of supply chain management, playing a significant role in supply chain. So thereare theoretical value and realistic significance in improving the competitiveness of thesupply chain, by studying the inventory models in supply chain.In this paper, we studies the two-stage supply chain inventory problem understochastic demand, with a single retailer and multi-suppliers, and the demand of theretailer’s customer is random, every supply channel is susceptible to disruption risks.When break happens, only a fixed fraction of the original order quantity is met by thissupply channel. The thesis consists of five chapters.In chapter1, we introduce some basic concepts and the status of researches athome and abroad about supply chain management and inventory management insupply chain, the main work of this paper is proposed.In chapter2, two classical inventory models of are described, i.e. NewsvendorModels and Economic Order Quantity Models, and the development of these models.In chapter3, we establish the profit maximum model, under unconstrainedcondition, from the retailer’s view. which is based on the two-stage supply chaininventory problem under stochastic demand, with a single retailer and multi-suppliers,where the demand of the retailer’s customer is random and every supply channel aresusceptible to disruption risks. When break happens to one of the supply channel, onlya fixed fraction of the original order quantity is met by that supply channel. We provedthat the profit function is convex, and get the first order necessary condition of theoptimal order quantity, the model is simulated and the results are analyzed.In chapter4, the profit maximum model, under service levels, capacity and fund condition, are studied, and the conditions of optimal order quantity are obtained. Someproperties of these functions are proposed, and models are specified.In chapter5, we give the conclusions and future research on this thesis.