QUANTITY AT COMPLETION VS. ORIGINAL QUANTITY

Hi Sinan,

Your problem can be resolved by tuning the Autocost Rules (Tools --> Options --> Autocost Rules...).

There are several options (e.g. set ’Freeze resource units per time period’ to No, or set ’Use update percent complete against budget to estimate Actual quantity to date’ to No), but these options must be applied with care and they depend on your project characteristics.

Here are two resources that may help you:
A very detailed presentation paper from Ron Winter: http://www.ronwinterconsulting.com/rabaseline.htm
The "Planning Using Primavera P3® Version 3.1 - Revised 2006" book by Paul E Harris addresses the Autocost rules in its chapter 19 (book sample is available on http://www.eh.com.au/index.htm)

Hope this helps...