The problem is to determine the optimal replacement policy ( N , T )? such that the long-run expected cost per unit time is minimized.

利用几何过程，以系统大修次数N和大修时间间隔T为更换策略，选择最优策略（ N ， T）使系统经长期运行单位时间的期望费用最小。

youdao

An optimal replacement policy for series repairable system is studied assuming that the component after repair is not "as good as new" by using the geometric process model.

在假定故障部件不能“修复如新”的条件下，基于几何过程模型研究可修串联系统的最优更换策略。

youdao