Application: ⊙ past implementation shows that the original estimate is completely outdated

⊙ the original estimate of condition change is not suitable 2) formula 2: EAC = AC + bac-ev (actual expenditure + budget bac-ev of remaining work) application: the current deviation is regarded as a special case, and similar deviation will not occur again. Where bac-ev is the remaining budget 3) formula 3: EAC = AC + (bac-ev) / CPI