If direct assessment in difficult, Benefit Transfer Method (BTM) is always used in evaluation process.

当直接评估存在困难时，成果参照法被经常采用。

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Capacity benefit margin (CBM) is evaluated and optimized via an iterative method based on a presumed generation reliability level when the available transfer capability (ATC) is calculated.

目前在求解可用输电容量(atc)时，容量效益裕度(CBM)的评估是根据预先设定的某一发电可靠性水平多次计算可靠性，进行迭代优化。

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