Nowadays, to protect the interests of customers, quite a few warranted products are sold with some kinds of repair thresholds. For example, a mobile phone manufacturer may provide a replacement service if the phone sold still cannot work after several repair attempts or the cumulative repair time reaches 7 days or 1 month. Motivated by this observation, we study a non-renewing replacement warranty policy with a repair number threshold and a repair time threshold, in which the manufacturer has responsibility for replacing a product when the number of failures is beyond the repair number threshold or the cumulative repair time reaches the repair time threshold, whichever occurs first. In addition, an age-based post-warranty maintenance strategy is developed for the non-renewing replacement warranted product, which provides a lower cost rate than the existing ones. Based on the indicator function method and renewal process theory, we derive the product’s life cycle cost rate. Finally, considerable numerical experiments are carried out to show the influences of various parameters on the proposed maintenance strategy.

如今，为了保护消费者的利益，不少保修产品在销售时都设置了某种维修门槛。例如，如果所售手机经过多次维修仍无法使用或者累计维修时间达到7天或1个月，手机制造商可以提供换机服务。受此观察的启发，我们研究了一种具有维修次数阈值和维修时间阈值的不续保更换保修政策，其中当故障次数超出维修次数阈值或累积维修时，制造商有责任更换产品时间达到修复时间阈值，以先发生者为准。此外，针对非更新更换保修产品制定了基于年龄的保修后维护策略，这提供了比现有的更低的成本率。基于指标函数法和更新过程理论，推导了产品的生命周期成本率。最后，进行了大量的数值实验，以显示各种参数对所提出的维护策略的影响。