iProcurement Requisition Approvals

 Our company recently implemented iProcurement.  I have used iProcurement in the past and am having difficulties recalling how the approval process works/can be setup for iProc.  I wanted to post this question out to the community to find out how other companies are currently handling this topic.

During the requisition process, we are currently having our business users approve it based on the approval hierarchy.  We have Oracle HRMS implemented and use the job codes to designate the necesssary approval assignments.  Once the requisition is approved, the Purchasing buyers then are able to auto-create the approved requisition into a Standard Purchase Order.  The PO shows up as an incomplete status since the Purchasing buyers do not have the necessary approval limits in the Oracle Purchasing system.   It now needs to be re-routed to the business approvers once again in order for them to approve the PO document.  This