Actual Cost or AC = 700 Cost Variance or CV = 200 Schedule Variance or SV = -100 First, find the value of EV or Earned Value = CV + AC = 200 + 700 = 900 Next, find the value of CPI CPI = EV / AC = 900/700 = 1.28 Then , you have to find the value of PV (Note that since the value of Schedule variance is negative , it gets added) PV = EV - SV = 900 - (-100) = 1000 Finally, use the value of PV to find the value of SPI SPI = EV / PV = 900 / 1000 = 0.9