Inventory Model For Deteriorating Items Under Three-stage Demand And Pledge Financing With Partial Backlogging

With the advancement of economic globalization, the competition among enterprises become more and more fierce and multiple. Today, due to the rapid development of e-commerce and Internet Finance, many enterprises have to face fierce competition from various fields and inventory management is-sues are becoming increasingly complex. Information, such as production technology and production scale,is more and more open and transparent.The profits of production processes been repeatedly compressed,in order to gain greater market share and scale economy, companies want to provide excellent quality and reasonable price goods to downstream consumers or other busi-nesses.Therefore,it is very important for decision makers that how to select scientific and effective inventory control strategy taking multiple factors into consideration.Based on the existing research results,this paper consider short life cy-cle, high phase-out rate of deteriorating items and study the inventory control problems. In this paper,at first we extend inventory model under ramp de-mand rate to that of three-stage demand.According to the assumption that the product life cycle begins with the sales process, deterioration rate follow two-parameter Weibull distribution and market demand partial backlog when shortage, we give the more available inventory model and optimal inventory replenishment policy.Then,we introduce the concept of inventory financing.Limited be the quan- tity of working capital and fixed assets,enterprises can not establish lending business contacts with commercial banks and obtain profits of scale econo-my. Here we achieve cooperation between enterprises and banks through the following contract:banks lend to businesses to order products and uniformity manage part of the ordering supplies as mortgage,which will be sold pref-erentially to customers in a higher price.Optimizing the foregoing inventory model,we establish an inventory control model for deteriorating items under three-stage demand and inventory financing strategies, give the optimal mort-gage financing corporate strategy. Finally we verify feasibility of the model by a numerical example.Different from previous research inventory financing policy, note that three-stage demand here may be in either the linear form or a non-linear one.So the scope of the model become more widely. On the other hand, this paper over-come the limits of fixed demand rat and fixed deterioration rate and analysis the impact of shortage.The optimization model enrich the research of inventory management theory. Especially it has made outstanding contributions to help SMEs solve the funding problem and expand the product scale.