Study On Retailer's Dual-source Purchasing Strategy Under Random Yield

Under the influence of the supply chain globalization and the national macroeconomic policy and other aspects,an increasing number of challenge which supply chain should be faced,such as natural disasters,differences in the level of technology,lack of labor and so on.These factors make the probability of the supply risk be improved continuously,which make serious influence on the production efficiency and benefits of the enterprise.In addition,with the shortage of resources and the aging of the population,the costs of the raw material and labor have been increased significantly.And reducing the production costs has become the key to limiting corporate profits and to maximizing the use of resources Therefore,in order to deal with these problems,how to develop effective preventive measures and order strategies are particularly important.The paper takes the reality of the random yield into consider and study the purchasing strategy and order allocation problem of the retailer.Besides,the paperestablishes a mathematical model to analyse the related issues quantificationally.And it aims to provide corresponding preventive measures for manufacturing enterprises.Meawhile,the study provides the theoretical basis and support for risk management.The paper studies a decentralized supply chain consisting of a retailer and two suppliers.Based on this,we study retailers' optimal ordering decisions and expected profit under different combinations of random environments.The first model is a dual-source procurement model with a risk supplier who has a random yield,and the demand is uncertain.The second model is a dual-source procurement model with two suppliers whose yields are random,but supply chain is faced of the determined demand.And the third model is set on the basis of the first one,change from the determined demand into the random demand.Then,we discuss the retailer's optimal purchasing decision and order allocation problem based on three models.At the same time,the paper analyzes the effect of ordering decisions on the different purchasing sequence and different decision makers.And though a multiple comparison,getting the conditions for dual source ordering.Finally,the research have some numerical analysis of the wholesale price,mean of random yield,variance of random yield,input and other factors.We find that the wholesale price is the first factor considered by retailer when having a purchasing decision,and the risk of random yield can be ignored completely under some certain conditions.