# PMP Formula Cheet Sheet

To pratice your pre-exam and review each question with detail explanation, let try with our FREE Exam tool

 Keywords Formulas Schedule Performance Index (SPI) Ratio between EV and PV, to reflect whether the project work is ahead of / on / behind schedule in relative terms SPI = EV/PV EV = Earned Value PI = Planned Value < 1 Project is behind schedule = 1 Project is on schedule > 1 Project is ahead of schedule Cost Performance Index (CPI) Ratio between EV and AC, to reflect whether the project work is under / on / over budget in relative terms CPI = EV/AC EV = Earned Value AC = Actual Cost < 1 Over budget = 1 On budget > 1 Under budget Schedule Variance (SV) Whether the project is ahead of or behind schedule SV = EV - PV EV = Earned Value PV = Planned Value Negative is behind schedule Zero is on schedule Positive is ahead of schedule Cost Variance (CV) CV = EV - AC EV = Earned Value AC = Actual Cost Negative is over budget Zero is on budget Positive is under budget Estimate At Completion (EAC) The estimated total amount of money needed to be put into the project based on the information available as today EAC = BAC/CPI BAC = Budget at completion CPI = Cost performance index Estimate To Complete (ETC) when original estimates are flawed How much more do we need to put into the project to complete it ETC = EAC - AC EAC = Estimate at completion AC = Actual Cost Estimate To Complete (ETC) when variance are typical How much more do we need to put into the project to complete it ETC = (BAC - EV)/CPI BAC = Budget at completion EV = Earned Value CPI = Cost performance index Estimate To Complete (ETC) when variance atypical How much more do we need to put into the project to complete it ETC = BAC - EV BAC = Budget at completion EV = Earned Value Number of Communication Channels N(N-1)/2 Where N = Number of project team members Expected Value (EV) or PERT Estimation How much work was completed to date (O + 4M + P)/6 O = Optimistic estimate M = Most Likely estimate P = Pessimistic estimte To-Complete Performance Index (TCPI) base on the BAC TCPI = (BAC - EV)/(BAC - AC) BAC = Budget at completion EV = Earned Value AC = Actual Cost To-Complete Performance Index (TCPI) base on the EAC TCPI = (BAC - EV)/(EAC - AC) BAC = Budget at completion EV = Earned Value AC = Actual Cost EAC = Estimate at completion Total Float (or) Total Slack LS - ES (or) LF - EF LS = Late start ES = Early start LF = Late finish EF = Early finish Standard Deviation of a Task (P - O)/6 P = Pessimistic estimte O = Optimistic estimate Present Value (PV) How much work was scheduled to date PV = FV/(1 + r/100)n n = Number of years r = Discount rate Future Value (FV) FV = PV/(1 + r/100)n n = Number of years r = Discount rate Net Presnet Value (NPV) The higher the better Internal Rate of Return (IRR) The higher the better The Payback Period The lower the better The Life Cycle Cost The lower the better The Benefit to Cost Ratio (BCR) The higher the better Critical Path Path with longest duration Rough Order of Magnitude (ROM) Estimate Estimated value + or - 50% Variance (Standard Deviation) * (Standard Deviation)