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维 修 成 本 的 预 测<br />

服 从 分 布<br />

分 布 参 数<br />

需 求 量 Normal (mean, std dev) mean=10000, std dev=800<br />

不 合 格 率 min + (max - min) * Uniform () min=0, max=0.05<br />

单 位 维 修 成 本<br />

min + (max - min) * Triangular((mode - min)<br />

/ (max - min))<br />

min=2, mode=7, max=12<br />

返 修 率 min + (max - min) * Uniform () min=0, max=0.008<br />

单 位 返 修 成 本<br />

min + (max - min) * Triangular((mode - min)<br />

/ (max - min))<br />

min=14, mode=84, max=49<br />

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