This document outlines the steps to set up a position-based approval hierarchy in Oracle Applications to approve purchase order documents. The key steps include: defining employees, jobs, positions and assigning them; defining approval groups; assigning approval groups to positions; defining the position hierarchy; defining a buyer and users; and running a report to fill the employee hierarchy. It then provides an example of creating a purchase order, submitting it for approval, and observing it flow through the approval hierarchy based on the positions defined.