In the purchase order workflow you cannot select the" is at or below" option for the procurement category header. You must select every category header and sub-category for the approval to follow the correct path. The option is available in the purchase requisition workflow and I would expect the purchase order workflow to follow the same behaviour. Our client wants to only create purchase order as they only have 15 users creating PO's and no procurement team, so no RFQ functionality and also want to use the mobile APP for directors to approve, which has no Req approval. The only option in the purchase order workflow is "is" or "is not" and as you now procurement categories are being added to constantly, so you do not want to have to maintain the workflow every time.