i-Procuement Requisitions and Position Hierarchy

Is it possible to use a Position Hierarchy in i-Procurement with AME  we are on R12

We need a position hierarchy to route requisitions to the CFO before going to the President,

In supervisory assignment VP's reports to the President - for requisition approval we want to route the CFO then if over the CFO limit to the President -  - we can make a position hierarchy to do this.

We also need pre-approval for items over $5,000 to go to the Acctg Manager for account review and Pre-approval of Fixed Assets by the FA Accountant -  - these can be done in AME,. --