From the SEARCH archives :
 
1.  Lynn said on 3-17-2004
It is important, at least on the final receipt or in WO-J when closing the work order, to answer Y to the wuestion about rebuilding the summarized costs from the transaction detail to be sure the closing entry nets the WO to $0 WIP.  
 
2,  Cyndee used -rebuilding the summarized actual costs got rid of them- to zero out unwanted Xactions.
 
 
So when   and why  do you say NO  to this question about rebuilding the summarized costs?
 
Thanks,
Laura  

Actually, the ONLY reason not to rebuild the costs is if you are in a big hurry and your Work Order files are huge because you have never archived anything so it takes too long.  You should always say Yes, whether it is a partial or the final if you want accurate actual costs.  If you always dor Finished Production at Standard Cost (at least for partials) then it is only important for the final receipt.