(m,T) Group Maintenance Policies
建立了一个协调群体维护规划的模型，研究在时间T或发生m次故障时进行群体维护的策略，以最小化长期平均成本，并提供了适用于一般故障时间分布和成本结构的算法。
A model that recognizes the advantages of coordinated group maintenance planning is established. The maintenance policy that is investigated calls for group maintenance to be conducted at time T or upon m failures, whichever comes first. This policy combines the best features of the well-known T-age and m-failure replacement policies. Using a renewal approach the economic objective is to minimize the long-run (expected) average cost per unit time. General cost structures and failure time distributions are allowed. An algorithm that does not require unimodality properties is provided for computing optimal policies for general failure time distribution and cost structures.