本文為不定時偵測之租賃系統，提出一個最佳維護策略。該策略主要在每一個偵測時間，進行最佳動作之選定，並且依當時之系統狀態，選擇下一個偵測點。本文假設：1. 每一個選定之維護動作皆為 “最小維護”；2. 偵測時間與維護時間皆可忽略。最後；利用模擬說明該租賃系統如何進行本維護策略。由模擬結果，我們得到該系統採用此策略後，總成本與總操作成本可分別減少4% 與35%。

A maintenance policy is proposed herein for a leased system under irregular inspection. Such policy is mainly at each inspection time to determine the maintenance action optimally and also to determine the next inspection time based on the current system conditions. Such policy holds by considering that: (1) each maintenance taken is regarded as a minimal repair; (2) the times spent on inspection and maintenance action are ignored. An example is presented to show how such policy can
be carried out for such leased system in terms of the maintenance data generated through applying simulation. The simulated results illustrate that the total cost and the total operating cost of the system
by taking such policy can reduce about 4% and 35% respectively.