AME APINVHDN workflow - Need to build a hyerarchy of invoice line hold resolution using like-PO hyer

Hello

We are trying to set up an AME invoice line hold resolution in Payables, we are in 12.1.3, but we are failing to build a hierarchy.

In this scenario, the data entry creates an invoice from a supplier. Then match the invoice line 1 with te purchase order line 1. If the line amount of the invoice line is greater than the amount of the purchase order, then the invoice line must be holded. If the difference between the amounts is up to 5% the invoice lilne must to be approved by the supervisor level 1 of the buyer of the purchase order. If the difference between the amounts stayss between 5 and 20 %, the line approval workflow must require the approval of the supervisor