此篇論文的目標，即是研究以多階段服務時間分配來描述電腦服務設施的運作情形，Cheng(1997)曾以指數分配來描述電腦系統服務運作的情形，並在考慮電腦系統損壞下，對等候線上顧客期望平均等候時間做出了若干推導，但是現實生活中，顧客(使用者)對計算機中心的使用，並不只侷限做單一工作，很可能一次的使用中就包含了數個工作項目或步驟，故我們嘗試以一個更一般的分配來描述電腦系統服務情形，在同樣考慮系統損壞的條件下，討論電腦服務設施(計算機中心)的定價與產能決策，重新推導顧客在系統內的期望平均等候時間，也對電腦系統分析了不同的參數環境下之結果，最後與Cheng(1997)提出之模型做一分析比較，藉由圖形討論其相關意涵與造成此結果的原因。 The objective of this paper is to examine the impact of introducing a multistage distribution in the computer service facility. Cheng(1997) had derived the model which considered the circumstances of computer systems subject to breakdowns and was described with exponential distribution. However, in practice, services provided by a computing center to a user might not be consisted of a single step but often several steps. Consequently we consider a more general distribution to relate the operation of computer systems. Under the same condition of systems breakdown discussed in Cheng(1997), we discuss the pricing and capacity decision of the service facility, renew the model of users’ expected waiting time in the system, and analysis the results between different parameters setting. We compare our model with Cheng(1997) numerically and graphically, and discuss the implication of these different results.
