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项目管理 公式

| name | formula | cn | | ------------------------ | --------------- | -------- | -------------------------------- | | Standard Devision | = (P-O)/6 | 标准差 | | TF/Total Float | = LS-ES = LF-EF | 总时差 | | Comm Channels | = N(N-1)/2 | 沟通渠道 | N=项目成员 | | Benefit Cost Ratio | =Cost / Benefit | | < 1 不好、拒绝
> 1 越高越好 | | Net Present Value | =FV/(1+r)^n | 净现值 | | Future Value | =PV(1+i)^n | | ROI/Return of investment | |

标准差​

SD2=∑i=1N(xi−μ)2NSD^2 = \frac{\sum^N_{i=1}{(x_i - \mu)^2}}{N} SD=∑i=1N(xi−μ)2NSD = \sqrt \frac{\sum^N_{i=1}{(x_i - \mu)^2}}{N}
  • μ\mu 为平均值 (x‾)(\overline{x})
info
  • Standard Deviation - SD - σ - sigma
  • 标准差、标准偏差、均方差
  • 测量一组数值的离散程度
  • 可用于 投资 - 量度回报稳定性的指标