You can recalculate task duration so that the application computes the shortest possible task duration. To recalculate task duration, select one or more tasks from the current view, and select Tools, Recalculate.
To eliminate resource over commitment and to maximize resource use, Open Workbench recalculates task duration according to the ETC, total resource availability, and maximum percentage load. The following mathematical calculation is used for recalculating task duration:
Duration = actuals + ETC/(resource availability per day) x (max % availability per day)
The recalculation process also maximizes resource use to shorten task duration whenever possible. If a task is inherently over committed, recalculating task duration can extend its duration to eliminate any inherent resource over commitment for that period. The exception is when the task is fixed.
When you assign multiple resources to a task and you recalculate the task's duration, Open Workbench computes the duration for each resource separately and selects the longest duration to determine the total task duration. All incomplete tasks in the selected range are adjusted, except for fixed tasks. If you recorded resource actual usage on the task, the ETC is modified.
Tasks with a Contour loading pattern are recalculated as Uniform. The recalculation process also replaces patterns created by autoschedule, and computes duration based on total availability per task. Locked or completed tasks are not impacted by the recalculation process. Instead, if the task has an ETC, the incomplete portion of the task is modified.
Example 1
Resource availability is 8 hours per day and the maximum percentage is 50% (the resource can work on this task 4 hours per day). If usage is 12 days, when you recalculate the task duration, the task's duration computes to 24 business days.
Example 2
Resource availability is 4 hours per day and the maximum percentage is 50% (the resource can work on this task 2 hours per day). If usage is 12 days, when you recalculate the task duration, the task's duration computes to 48 days.
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