How to use Alternate Item while creating PO.

Summary:

The customer wants to use the Alternate Item functionality.

Content (required):

We have the Below cases.

Item A has a substitute Item which is Item B at the Item master level, I have already explored the Manage mass Item Replacement feature and the customer is not able to relate its business scenario with this feature.

if the requester submits the Requisition with Item A and when it goes to the Buyer for PO creation then if the buyer is aware of the current market condition and decides not to go with Item A and Order Item B, instead of using PR Return or new line addition at PO level he wants the functionality where he can update or Amend the Item number.