How to setup Intercompany BPM approval workflows

I want to make a workflow where the person placing the order always approves first, not the person receiving the order.

In an intercompany transaction, there is a requirement to have the person in charge of two affiliated companies approve each of the transactions.

In this case, in order to have the person in charge of the purchase side (Company A) approve the order and then have the person in charge of the order side (Company B) approve it, would we first set the person in charge of Company A as the first approver in the approval workflow and then set the person in charge of Company B as the next approver?