S
Sentrovia teamStarter question
July 8, 2026

What's the difference between EAC formulas?

PMBOK lists 4 EAC formulas: BAC/CPI, AC + (BAC-EV), AC + bottom-up ETC, and AC + (BAC-EV)/(CPI*SPI). When do you use each one? I keep getting different answers on practice exams.
1 replies
evmeacformulas
LinkedIn X

1 Reply

Sentrovia team7/8/2026

Use BAC/CPI when the current cost variance is typical of future work. Use AC + bottom-up ETC when past performance isn't representative. Use the CPI*SPI formula when both cost AND schedule affect future costs. The exam tip: if the question says 'assuming current trends continue,' use BAC/CPI.

Want to join the discussion?

Sign up free to ask questions, share insights, and build your PM reputation.

Join Sentrovia Free