The Study Of Economic Order Quantity Models In Muti-supplier Condtion

With the rapid development of social economy, the market competition has become more fierce, product life cycles have been shortened, customers demands have become more discriminating, and the time has become more important. It increases uncertainty and dynamics of operation of the enterprises production planning, causes the enterprises to face the stern challenge, and sets a higher request to supply chain management.This article is for the purpose of studying the supply chain's purchase and the inventory. How to control the purchase cost and improve purchase efficiency is supplies the important side which the article studies.This article starts from ordering decision-making process .These questions will be studied systematically in this article: first we study the economical ordering batch model in the single suppliers condition ,then EOQ formula is extended in multi-suppliers situation when the demand is sure ,last we establish model in multi-suppliers situation when the demand is definite. Besides, Supplier's choice and appropriate profit assignment are also discussed. The model establish for every question,produce the culations with proper steps, and some examples to confirm the model is accurate and effective. Not only in theory but also in reality studying the supply chain purchase question are both very valuable.In brief, through studying the supply chain's purchase question systematically we can explain purchase question intrinsic rule.It is better for reducing purchases cost,enhancing purchase efficiency and doing the purchase decision-making in scientific style which have important theory significance and practical significance.