Grouping rules from Requisition to Purchase Order based of Items or Sub-inventory

Hello All,

I have a situation, perphaps this may be a common situation elsewhere too.

We are interfacing Requisition from a EAM application to Oracle. Where in EAM application has a multiple stores (say sub-inventory) in oracle terms is tied to a same location (HR location in Oracle). In such cases, I'm facing a problem when it comes to grouping/ungrouping Reqs to PO.

Let's say there are multiple requisitions create with line having the same item, same need-by date and same location. All other attributes may also be similar.

For ex:

Requisition#	Req Line#	Item	Quantity	Need-By Date	Location