ISO and Shared Procurement

Hello

We have Company A-->Distribuite, while Company B--->Manufacture.

I need to buy the raw materials in Company A, those material is going to be used in Company B to produce the finish goods that will be shipped to Company A. Company A can not bill the raw materials to Company B. 

To summ up, I was wondering if I need to setup the intercompany model having the shared procurement . However I can not bill the raw materials hence I was thinking to avoid generate the invoices and in AP , pay the invoices having a dummy Bank Account.

The Company A's raw material ownership is not transferred to Company B, hence I was wondering if I can define a consigned inventory and CONSUMPTION rule will be a an ISO