Delivery date from PO not updated with inbound delivery (EDI) date

Question

Dear all,
The delivery date in the purchase order (as per my understanding) is the purchase order creation date + the planned delivery time.
We are using EDI and an inbound delivery gets created when the shipping notification is received from the vendor.
The real inbound delivery (EDI) date is usually different from the planned delivery date of the purchase order. But the problem is that the delivery date from the PO is not getting updated with the EDI delivery date.
Is it possible to have the delivery date from the PO updated with the real EDI delivery date?
I need this because I want to calculate planned delivery costs based on the EDI delivery date, and so far when I post the goods receipt (Price Date Category = "Delivery date" in the PO), the system is taking the price valid at the delivery date from the PO instead of taking the price valid at the delivery date of the EDI message.
Thanks a lot,
Annabelle R.

Answer 1

We have applied the note 793478 "Change of the pricing date in EXIT SAPLEINR 003".
In our process flow, an inbound delivery is created with reference to the PO, then the goods receipt is done with reference to this inbound delivery.
When the option 5 "Goods receipt date" is selected in the Conditions Control tab of the purchase order, now when the goods receipt is posted, the price is calculated based on the inbound delivery date, which is what we wanted.