特别的，此参数的构成是以平方英尺计的单品，托盘，地面存储的开平方根的加权平均值。

Specifically, the index constructed was a weighted average of the square root of the broken-case, pallet are and floor storage square footage estimations.

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Cpm是一个总体的能力指数，定义了均值偏离目标值的均方差的平方根和规范宽度的之间的比值。

Cpm is an overall capability index defined as the ratio of the specification spread (USL - LSL) to the square root of the mean squared deviation from the target.

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