Abstract: With the increasingly complexity of equipment product structure and function,shortening of the research and development cycle,and accelerated replacement,the industrial competition has been extended from the traditional price and quality competition to warranty competition,from the competition of a single manufacturer to the competition of the whole supply chain system.Existing research mainly focuses on the decision-making problems of warranty period and price.With the increasing complexity and safety requirements of CNC machine tools and other engineering equipment,customers have put forward higher requirements for product quality and equipment reliability.The equipment product deteriorating with aging was taken as the research object in this paper,and a two-level service supply chain profit model of under Stackelberg game with strong manufacturer bundled sales of "product + warranty" was constructed.Moreover,the impact of warranty period and preventive maintenance frequency on the equilibrium price of product-service package was discussed,and the optimal strategy with the changing of the warranty cost was verified and analyzed,which provided a new and scientific approach for the optimization of product service strategy.

Key words: product warranty, preventive maintenance, profit model, service supply chain, Stackelberg game

摘要： 随着装备产品结构与功能日趋复杂、研发周期缩短、更新换代加快,工业竞争已经从传统的价格和质量竞争,延伸至产品质保服务竞争,从单一制造商竞争拓展至全供应链体系竞争。现有的产品质保研究主要关注质保期和价格的决策问题,而随着数控机床等工程装备复杂性与安全需求的不断提升,客户对产品质量与装备可靠性提出了更高的要求。以随时间加速劣化的装备产品为研究对象,构建强势制造商捆绑销售“产品+质保”的两级服务供应链在Stackelberg博弈下的利润模型,研究质保期和预防性维修频次对产品服务包均衡价格的影响,在此基础上对质保成本发生变动时的最优策略进行验证分析,为产品服务策略优化研究提供了科学有效的新途径。

关键词: 产品质保, 预防性维修, 利润模型, 服务供应链, Stackelberg博弈