基于现场可靠性的产品区域差别保修期设计方法

考虑到产品保修多局限于固有可靠性的统一保修期设计，提出将现场可靠性与保修期区域差异相关联，构建一种基于现场可靠性的区域差别保修期设计方法。在分析保修期影响因素的基础上，采用多项式拟合函数估计各区域的现场可靠性，构造出新的各区域保修成本与销售量预测函数；再建立综合考虑现场可靠性、保修成本、销售量和价格的区域差别保修期高维优化模型，并结合进化算法进行求解，最终确定最优的各区域保修期和价格。经空调产品实例验证表明，与传统做法相比，所建模型能定量评估各区域空调保修期的差异程度，具有显著的分区保修效应，且采用区域差别保修期是降低企业保修成本与增加保修效益的有效途径。

Regional Difference Warranty Period Design Method Based on Field Reliability

As product warranty design is largely limited to the unified warranty based on inherent reliability, it is proposed to associate field reliability with regional difference of the warranty period and develop a method for regional difference warranty period design based on field reliability. By analyzing the influencing factors of the warranty period, a polynomial fitting function is used to evaluate the product field reliability in different regions. And the prediction function for expected warranty cost and sales volume for each sub-region is developed. Furthermore, establish a novel high-dimensional optimization model that comprehensively considers field reliability, warranty cost, sales volume and price, and solve it with the evolutionary algorithm, so as to determine the optimal warranty period and price for different regions. Finally, the model is applied to optimize warranty design of air-conditioning. Compared with the traditional models, the proposed model can quantitatively evaluate the difference degree of warranty period in different regions, and has a significant partition warranty effect. Moreover, adopting a regional differential warranty period strategy is an effective way to reduce warranty costs and increase warranty benefits.