頁籤選單縮合
題名 | State-Dependent Replacement Policies for Deteriorating Systems Subject to Random Shocks=隨機衝擊下退化系統之狀態置換策略 |
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作者 | 葉瑞徽; | 書刊名 | 工業工程學刊 |
卷期 | 15:5 1998.09[民87.09] |
頁次 | 頁489-494 |
分類號 | 319.16 |
關鍵詞 | 半馬可夫退化系統; 隨機衝擊; 狀態置換策略; Semi-markovian deteriorating system; Random shocks; State-dependent replacement policy; |
語文 | 英文(English) |
中文摘要 | 本論文探討隨機衡擊下半馬可夫多階遏化系統之「狀態置換」策略。就半馬可夫退化系統而言,最佳置換策略不僅與系統狀態有關,更與系統在某一狀態中停留時間的長短息息相關,但是實務上系統在某一狀態之停留時間往往無法得知或正確估計,因此只能依據系統狀態來決定系統是否應該置換。針對上述狀況,本論文推導半馬可夫退化系統在衝擊下之最佳「狀態置換」策略使得期望成本率最低,並進一步探討最佳策略之性質。 |
英文摘要 | This paper investigates the optimal state-dependent replacement policy for a semi-Markovian deteriorating system subject to random shocks. For a semi-Markovian deteriorating system, it is well-known that the optimal replacement policy is state-age-dependent. However, the state-age of a system may not be known in practice. In this situation, the state-age-dependent replacement policy is not applicable and the state-dependent replacement policy becomes a suitable choice. The objective here is to derive the optimal state-dependent replacement policy such that the expected long-run cost rate is minimized. We show that the optimal policy is of control limit type and has monotonic properties with reasonable conditions on the cost and time parameters. Furthermore, a comparison of the optimal state-dependent and teh optimal state-age-dependent replacement policies is conducted. Finally, a numerical example is given to illustrate the performanced of both optimal policies. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。