关键词: 改良品, 缺货, 数量折扣, 供应链协调

Abstract: By considering a two-echelon supply chain of ameliorating items consisted of a retailer and a supplier,the lot-for-lot policy was adopted to admit the retailer shortages and all shortages backlogging.The optimal ordering strategy of supply chain between the centralized and the decentralized decision were compared,and the result showed that the unit time total cost of supply chain under the centralized decision was obviously lower than under the decentralized decision,but the centralized decision would lead to increase the unit time total cost of the retailer.For compensating the cost losses of the retailer under the centralized decision,a quantity discount strategy provided by the supplier was applied to coordinate the supply chain.The quantity discount model was established and the optimal quantity discount contract was obtained.The numerical example verified that the optimal quantity discount contract could realize the unit time total cost minimum of retailer and supply chain at the same time.Through comparing with the existing literature,the research manifested that the unit time total cost of ameliorating items' supply chain with shortages was lower than with non-shortages when supplier provided the optimal quantity discount contract.The sensitivity analysis showed that the unit time total cost of ameliorating items' supply chain was negative correlation with the ameliorating rate,and positive correlation with per unit shortage cost.

Key words: ameliorating items, shortages, quantity discount, supply chain coordination