Definition:
Variance at Completion (VAC) measures the variance between the budget at completion (BAC) and the estimate at completion (EAC) of the project. It provides insights into whether the project is expected to be under or over budget. A positive VAC indicates cost savings, while a negative VAC suggests cost overruns. VAC helps in assessing the overall cost performance of the project.
Calculation: VAC = BAC - EAC
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