We use "Product Cost by Period" / "Product Cost Collector" here.
The confirmations are done only by CO15. (we don´t have confirmations by operation level).
When I run KKAS to calculate WIP, in some months appears non zero values to WIP... but what means this values, if I only use confirmations by order (CO15) (with backflush) ?
In this case (using confirmations by CO15) the value of WIP does not to be zero every time?