| 摘要 |
The present invention provides an index to make possible the evaluation of production efficiencies of a plant and provides a device for calculating that index. The device for calculating the overall plant efficiency according to the present invention comprises: (1) a means for calculating an availability, (2) a means for calculating a performance rate, (3) a means for calculating a quality rate, and a means for calculating the overall plant efficiency which is a product of items (1) through (3). The ratios (1) through (3) are indices reflecting categories in which all the factors causing reductions in the production efficiency of the plant are collected and categorized. The overall plant efficiency is an index whereby those items are comprehensively evaluated and the extent of assets utility can be evaluated.
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