How to Create Purchase Order automatically from Purchase Order.

Hi Team,

How a approved Purchase Order can be Created automatically from a Purchase Requisition once it is approved with out referring to a BPA and Quote.

Because User will create requisition with Supplier and Site name, Submits the Requisition. Once the Requisition is approved we want an approved Purchase Order. For this again do we need to Establish the Sourcing setup like Category - Supplier - Site relation.

Thanks

VIvek