在許多產業，設備成本是構成整體製造費用的一個重要比例。大部分的公司對於設備效率多著重在综合設備效率(Overall Equipment Efficiency, OEE)，較少著重在投入面之效率。整體投入效率(Overall Input Efficiency, OIE)可歸納成幾個構面，例如：作業員效率、原材料使用效率、廠務效率等。
本研究所解決之議題，在於決定最佳化之人機配置，並以理想的人機指派，尋找出作業員效率，作為計算整體投入效率的一部分。
本研究推導出單製程及多製程機台的人機配置計算式。並以模擬模型來驗證計算式之產品釋放時間和設備使用率，是否與模擬結果相符。透過計算式之運算，可以得知最適化之人機配置比例，並計算作業員利用率。資料來源為一家晶圓再生廠，以此個案說明設備使用率之計算方法，並經由計算式運算，發現作業員利用率可望加倍提昇。
本研究的貢獻有：
(1) 推導出一套計算式，可計算最佳化人機配置及作業員利用率。
(2) 提供一套Excel-based軟體，方便使用者計算理想化之人機配置
及使用效率。

In many industries, equipment costs constitute an important proportion of overall manufacturing costs. Much of attention has paid on overall equipment effectiveness(OEE) of equipment efficiency. Much less attention was paid on the input side of efficiency. The overall input efficiency can be divided into components such as: operator efficiency, material usage efficiency, facility efficiency, etc.
The research addresses the issue of determining optimal operator-machine configuration so that the ideal operator-machine assignment can be found thus the operator efficiency can be calculated as a part of overall input efficiency.
Formula for optimal operator-machine configuration for single and multiple process machines are derived. Simulation models were used to verify the formula with matching product releasing times and machine utilization rate. The formula allows us to determine the best operator-machine ratio and calculate the operator usage efficiency. Data from a wafer reclaim factory were used to illustrate the calculation of equipment usage efficiency, opportunity for doubling operator usage efficiency was identified using the derived formula.
Contributions of this work include:
1) Deriving a set of formula to calculate optimal operator-machine configuration and calculating the operator usage efficiency.
2) Providing an Excel-based software for easy calculation of the ideal operator-machine configuration & usage efficiency.

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