Compared with non-renewing warranty, renewing warranty is more attractive to the customers. To reduce the possible cost pressure of the manufacturers, this study proposes a novel two-stage renewing warranty model with a threshold of maintenance times. Based on a preset allocation ratio, the warranty period is divided into two stages, i.e. the renewing warranty stage and the minimal repair warranty stage. In the first stage, when the number of maintenance actions exceeds the given threshold, the failed item will be replaced with a new one and attached with a new warranty period; otherwise, the product will enter the second stage when its operating time exceeds the time span of the renewing warranty stage. When the product fails in the second stage, only minimal repair is performed. On this basis, four types of maintenance schemes are proposed, and the corresponding warranty cost and profit models are developed to optimise the warranty policy. A numerical example is provided to illustrate the effectiveness of the proposed model, and sensitivity analysis is conducted. The results show that by considering the threshold of maintenance times, the warranty cost can be reduced and the manufacturer's expected profit can be improved simultaneously.

与非续保相比，续保对客户更具吸引力。为了降低制造商可能面临的成本压力，本研究提出了一种具有维护次数阈值的新型两阶段更新保修模式。根据预先设定的分配比例，将质保期分为两个阶段，即换新质保期和小修质保期。第一阶段，当维修次数超过给定阈值时，故障项将更换新的并附加新的保修期；否则，当产品运行时间超过续保阶段的时间跨度时，产品将进入第二阶段。当产品在第二阶段出现故障时，只进行最低限度的维修。在此基础上，提出四种维修方案，并制定相应的保修成本和盈利模式，优化保修政策。提供了一个数值例子来说明所提出模型的有效性，并进行了敏感性分析。结果表明，通过考虑维修次数阈值，可以降低保修成本，同时提高制造商的预期利润。