According to my salesforce case 01903104 to correct IR booking in PO 4511841623 and the correction had been done after investigated on October 2013
Moreover,this point is reported to audit committees on external audit report for Q3/2013.
However, I found the same error was occurred in October for PO 4511854381 & 4511841852.
I had requested 3S-AP to correct IR in these PO and ask production people to reverse GI (goods issue) and make a new transaction after 3S-AP adjusted.
and production cost was re-run again by 3S-CTB
It is important to make a preventive action in the future
You can find story from my excel file attached.
Thank you for your feedback.