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When you assign a resource to a task, the estimate to complete (ETC) for the task is automatically calculated. Allocation (percent) and availability (Hours) for a resource assignment determines the ETC for the task based on the assignment start and finish dates. The calculation is based on the following formula:
ETC = the number of working days the resource is assigned to work on the task * the number of hours each day that the resource is available for work
The calendar and daily availability for a resource is used to determine the total availability for the resource. Unless you specify a different number in the resource profile, eight hours of work time are available daily, by default, for each resource is assumed.
Example 1
You allocate Aaron Connors 100 percent to a project and assign him to a task for 5 days with 8 hours availability. The ETC for Aaron is 40 hours. You allocate Patty Chen 50 percent to a project and assign her to the same task for 5 days. The ETC for Patty is 20 hours.
Example 2
You schedule a task between 6/30/11 and 7/30/11. The task contains 22 working days and has one resource assigned to it for 8 hours a day for all 22 days. The ETC for the task is calculated at 176 hours (22 days * 8 hours each day). You assign two resources to the task, each with a total daily availability of 8 hours. One resource for 50 percent of the available time and the other resource for 100 percent. The combined ETC calculates to 264.
See the Resource Management User Guide for more information.
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