关键词: 供应链网络, 延保服务, 产品质量, 多产品

Abstract: To obtain the optimal marketing strategy of enterprise under the situation of high quality service,the equilibrium decisions of the supply chain network,in which manufacturers make various types of product,provide extended warranty services and reduce the extended warranty cost by improving product quality was studied.The impact of the extended warranty ratio,the extended warranty period and the effort cost of the quality on the equilibrium decisions and profits was analyzed,and the correctness of the conclusions was verified by numerical examples.The results showed that the transactions of products and extended warranty services were increased first and then decreased with extended warranty period increasing,which made each member's profit of the supply chain change in the same way.Thus,manufacturers should choose the optimal extended warranty time.When manufacturers increased product quality investment,the price of products would be increased.It was unfavorable to the members of the supply chain for deducing the transactions of products and extended warranty services.The price of products would be decreased but the price of extended warranty services would be increased if the proportion of extended insurance was increased,and the transactions of products and extended warranty services would be also increased,which made the members' profits of the supply chain increase.

Key words: supply chain network, extended warranty service, product quality, multi-product