Variance at Completion (VAC) is a project management tool used to measure the difference between the planned and actual costs of a project. It is calculated by subtracting the budgeted cost of the project from the estimated cost of completion. VAC can be used to identify potential problems in a project, as well as to assess how well the project is progressing.
The formula for calculating VAC is: VAC = Budgeted Cost - Estimated Cost of Completion. This calculation can be done manually or with software such as Microsoft Project. The result will give you an indication of how much over or under budget your project is.
VAC can be used to help identify potential problems in a project before they become too costly. It can also be used to assess how well the project is progressing and whether it is on track to meet its goals. Additionally, VAC can be used to compare different projects and determine which one is more cost-effective.