Changing External Requirements 
Use
As a purchaser, you can change external requirements and copy them to SAP Enterprise Buyer, even after follow-on documents (purchase orders, for example) have been created.
Once a goods receipt has already been posted for the purchase order of an external requirement, it is no longer possible to reduce the purchase order quantity, or to delete the item. In this case, it is not possible to copy all changes to the external requirement to Enterprise Buyer.
Integration
The system
· Updates requirement items for which there are no follow-on documents automatically in the background.
· Transfers requirement items for which follow-on documents exist to the sourcing application of the purchaser.
Features
Depending on the changes made to the requirement, the following further processing is possible in the sourcing application of the purchaser:
· After the quantity has been increased, the item is displayed with the quantity that is still open. You can display the change documents in the detail screen for the requirement and this way you can find out when certain changes were made. You can decide whether to change the existing purchase order or to create a new purchase order for the quantity that is still open.
·
After the quantity
has been reduced or another value has been changed (the delivery date,
for example) the item is also displayed in sourcing. You can display all the
changes via the change documents and you can cause the item to be removed from
sourcing by choosing 
(Complete Item).
However, you cannot assign sources of supply for this item, nor can you create
a purchase order. You have to copy the change manually into the
purchase order that already exists .
· After items have been deleted from external requirements they are no longer displayed in sourcing. In Enterprise Buyer, if a purchase order already exists for a deleted item, the system attempts to delete the relevant purchase order item. If this is not possible (a goods receipt has already been posted, for example), the system sends the responsible purchasers a message, prompting them to contact the requester, for example.
In Enterprise Buyer the system does not physically delete items in purchase orders and shopping carts. They remain visible and are flagged with a deletion indicator.
See also: