The Percent Allocation fields contain the percentage that represents the total amount of a resource's capacity being allocated to tasks.
There are several categories of Percent Allocation fields.
Data Type Percentage (percentage field: A type of field whose content is a percentage. Examples include the %Complete and %WorkComplete fields.)
Percent Allocation (resource-timephased field)
Percent Allocation (assignment-timephased field)
Entry Type Calculated (calculated field: A field in which the value is determined by Project based on information in other fields. Project may recalculate the value automatically or when you specify, depending on your choice of calculation settings.)
How Calculated Microsoft Office Project bases the Percent Allocation field on the assigned resource's total work capacity on the assigned task. A resource's work capacity is determined by the resource's maximum units and resource calendar. To calculate percent allocation, Project divides the amount of work on an assignment by the resource's total work capacity, for the selected time period, as follows:
Percent Allocation = Assigned Work / Work Capacity * 100
Best Uses Add the Percent Allocation field to the timephased portion of the Task Usage or Resource Usage view when you want to display how much of a resource's capacity is being spent on a specific assignment in a particular time period.
Example The "Drafters" resource has a maximum units value of 200 percent. If this resource is working four hours in an eight-hour day, the resource's percent allocation is 25 percent, because the resource is working at 25 percent of its total possible allocation, or work capacity, of 16 hours.