(Program Evaluation and Review Technique) PERT  PERT = (P + 4M + O )/ 6

Standard Deviation (SD)  SD = P – O) / 6

Float/Slack  Late start – Early start Late finish – Early finish 
Communication Channels  n (n1)/2

Cost Performance Index (CPI)  CPI = EV/AC

Schedule Performance Index (SPI)  SPI = EV/PV

Cost Variance (CV)  CV = EV – AC

Schedule Variance (SV)  SV = EV – PV

Estimate At Completion (EAC)  1. BAC / CPI — if CPI remains the same
2. AC + ETC — Initial Estimates are flawed
3. AC + BAC – EV — if BAC remains the same

Estimate To Completion (ETC)  ETC = EAC AC

Variance At Completion (VAC)  VAC = BAC – EAC
