Direct answer
Forecast estimate at completion and estimate to complete from BAC, EV, and AC when current cost efficiency is expected to continue.
What to know
- Use consistent units for all inputs.
- Validate zero and negative values before dividing.
- State the forecasting assumption before using an output for a decision.
- Reconcile calculator results with the approved project data date and baseline.
How to apply it
Enter current, controlled project data. Review the formula and model limits before communicating the result, and retain the input values with the analysis.
Formula
CPI = EV ÷ AC; EAC = BAC ÷ CPI; ETC = EAC − AC; VAC = BAC − EAC.
Worked example
With BAC 1,000, EV 400, and AC 500, CPI is 0.80, EAC is 1,250, ETC is 750, and VAC is −250.
Common mistakes
- Mixing currencies or data dates.
- Reporting excessive decimal precision.
- Treating one formula as a guaranteed forecast.
Exam and practice connection
PMP questions can test both calculation and interpretation. Read the wording and identify the requested metric before calculating.