Duration Type / Percent Complete - Absolute Confusion

Hi There,

I am struggling to come to terms with the duration type and percent complete functions of P3e. I have read numerous texts and everything I can find on the subject.

All I want is to be able to update an activity where the At Complete Duration doesn’t change when I update the Actual Units.

However when I have an activity that is Fixed Duration and Units, and the percent complete type is Units... when I update the units and the data date... it increases the At Complete Duration. How can I possibly keep the at complete duration the same throughout?

Thanks,

Matt Lovkis