A new renewable warranty policy is suggested that increases the probability of its success and can decrease the corresponding costs for certain ranges of parameters. It deals with heterogeneous populations of items from two subpopulations (‘weak’ and ‘strong’) and is aimed at elimination and further replacement of weak items after screening at some optimal time. This elimination is performed when degradation described by the corresponding mixed degradation process reaches some optimally predetermined level. Probabilistic and cost analyses of the model are performed and the illustrative example is presented. It is shown that the proposed warranty policy with inspection outperforms the conventional one in a probabilistic sense. Furthermore, the proposed policy becomes economically beneficial especially when the additional penalty cost caused by a sudden failure is large.

建议采用新的可更新保修政策，以增加其成功的可能性，并可以降低某些参数范围的相应成本。它处理来自两个亚群（“弱”和“强”）的异质项目群，旨在在某个最佳时间筛选后消除和进一步替换弱项目。当由相应的混合退化过程描述的退化达到某个最佳预定水平时，执行这种消除。对模型进行了概率和成本分析，并给出了说明性示例。结果表明，在概率意义上，建议的带检查的保修政策优于传统的保修政策。此外，