Input
Results
Cost Variance CV = EV − AC—
Schedule Variance SV = EV − PV—
CPI = EV / AC—
SPI = EV / PV—
EAC—
ETC = EAC − AC—
VAC = BAC − EAC—
TCPI to BAC—
Method
CV = EV − AC; SV = EV − PV. CPI = EV/AC; SPI = EV/PV. ETC = EAC − AC. VAC = BAC − EAC. TCPI to BAC = (BAC − EV)/(BAC − AC). Sign: positive CV/SV means under budget / ahead of schedule; CPI/SPI > 1 same. Choose EAC method based on whether atypical (plain), typical-cost (CPI), or both cost+schedule (SPI·CPI) variances persist.