EVM 挣值管理 earned value management
ES 挣得进度 earned schedule
AT 实际时间 actual time
PV 计划价值
EV 挣值
AC 实际成本
SV 进度偏差 = EV-PV
CV 成本偏差 = EV-AC
SPI 进度绩效指数 schedule performance index = EV/PV
CPI 成本绩效指数 =EV/AC
EAC 完工估算 estimate at completion
BAC 完工预算 budget at completion
VAC 完工偏差 variance at cost = BAC-EAC
ETC 完工尚需估算 estimate to completion
