Hi,
take a look at
the Project Management User Guide
% Complete Calculation Method
Specifies the method for calculating the percent complete value for the project and tasks.
Values:
Manual. Use this method to enter the percent complete for the project, summary, and detail tasks manually. Also, select this calculation method If you are using CA Clarity PPM with Microsoft Project, or if you are using an external job to calculate % Complete. The % Complete field appears on the task properties page.
Duration. Use this method to track percent complete based on duration. The duration is a measure of the total span of active working time for a task: from start to the finish date of a task. In this method, enter the % complete for the detail tasks. The % complete for summary tasks is automatically calculated based on the following formula:
Summary Task % Complete = Total Detail Task Duration Complete / Total Detail Task Duration
Effort. Use this method to calculate the % complete for summary and detail tasks, automatically, based on the work units completed by resource assignments. If you assign a non-labor resource to a task, the effort and actuals for that resource are ignored in the calculation. The calculations are based on the following formulas.
Summary Task % Complete = Sum of Detail Task resource assignment Actuals / Sum of Detail Task resource assignment Effort
Detail Task % Complete = Sum of resource assignment Actuals / Sum of resource assignment Effort
Default: Manual