Viewing Alternate Software on the Alternates Tab
When the Request Type is a software request and the request has not yet been submitted to your deployment system for installation, the Alternates tab will display alternate items to deploy in place of the current item. This allows the request to be “switched” as necessary.

If an alternate product is listed and you click Select, you are prompted to select the users to notify of this switch, and to click Switch Request to confirm the switch.