Agreement with parent supplier but PO to be delivered from child-local suppliers

Summary:

Business Case : Supplier X is a global supplier, and we want to negotiate with this parent suppliers.

Supplier X is registered with different names in different regions / countries. At present we see option only to setup BPA with these local suppliers but ideally for buying organization we like to negotiate with parent supplier and contract/ agreement should be with this Global / parent supplier but when PR/ PO is raised system should pick local/ child supplier based on country / market of purchase.

This way buying organization can get better pricing benefit.

How to achieve this requirement?

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