MPM computes the percent complete for the WBS element based on the milestone weights entered for the following EVMs:
You may need to adjust the milestones if:
You discover that weights are not correct.
You have to add new milestones.
You have to delete a milestone.
After you adjust the milestone weights, you should restatus milestones for prior months and recalculate BCWP to correctly reflect the new milestones in your BCWP value. See Modifying Milestone Information for Work in Progress.
Modifying Milestone Information for Work in Progress
Changing an Earned Value Method (EVM)