How Quantity flows to MIRO

Question

Hi,
I have a question for the GR based Invoice verification briefed as follows
1. Created GR against PO
101 Mvt ty-- 10 Qty
2. Posted return delivery against 101 Material Doc
122 Mvt ty-5 Qty
3. Now If I go to post MIRO, I can see the quantity proposed for invoicing 5 Qty, Why?
Please help me to understand what is the logic behind and how the Calculation takes place for the quantity field in MIRO, Is there any note available ?
Thanks

Answer 1

Hi
Regarding the  "GR-Based Invoice Verification" (EKPO-WEBRE) indicator;
When this indicator is flagged in the purchase order item the system differentiate individual goods receipts.
A new goods receipt posted with reference to the purchase order item serves as reference document for follow-on postings. This way, we link every invoice with its respective goods receipt document.
This individual assignment between receipts and invoices can be seen in ME23 / ME23N, displaying the purchase order history and selecting the view "GR/IR assignment".
When a new goods receipt is not posted with reference to the purchase order item but with reference to an existing posting (as a subsequent delivery, for example), all the goods movements which keep the link are considered within the same "GR/IR assignment" block.
Also have a look at the following KBA regarding the valuation for the same
1827732 - Valuation when GR-Based IV (EKPO-WEBRE) is set in the PO item.
I hope this can help
Anna