Directs MacProject II to use actual dates when calculating several aspects of your project.
With Calculate Using Actual on, late dates and the critical path are determined by the actual dates. Slack time is calculated as the difference between the Latest Start of a task and its Actual Start, and it is shown as a shaded extension to the actual bars in the timeline charts. Resource durations are scheduled from the Actual Start of tasks.
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You should ordinarily have Calculate Using Actual on once your project is underway.