Approval hierarchy

Would you tell me how to create an approval hierarchy in purchasing and inventory?

Purchasing has two approval

Purchasing has two approval hirearchy - Position & employee supervisor You can get the details in below url http://www.oracleug.com/user-guide/purchasing-overview/approval-security-and-control http://www.oracleug.com/user-guide/purchasing-overview/purchasing-overview In inventory , approval is used only for move orders & Planner is the approver for all move orders The approval in AP, AR , GL, EAM etc are different from all these