DEA (mainly CCR model) is a useful method for an empirical analysis of the economies of scale.

DEA(主要是CCR模型)是对规模经济问题进行经验分析的有力方法。

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Then About the shortcomings the DEA CCR model has which is used for the most commonly DEA model, the writer gives the improved model.

然后针对DEA中最常用的CCR模型存在的两个缺陷，给出了自己的改进模型。

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CCR is appropriate for an application model that separates components into pieces that can interact only through messages.

CCR适用的应用模型是：多个组件分离到可以只通过消息交互的块。

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