What's the best way to handle PO approval workflows that are not solely dependent on the supervisor hierarchy in the employee record? For example, if the PO amount is within this range then, include this approver that is not part of the supervisor hierarchy.

I normally do supervisor approval first - and then do the additional amount approval range

Unfortunately, the additional approvers are inserted within the hierarchy (based on the parameters as well like what type of purchase). They are not the last approvers.

then you'd probably have to use a parallel field

Where is that usually located? In the PO itself?

nah, just on the transaction itself.

Thank you. But if those approvers that are to be inserted are just one person, is a custom field still relevant? Or can it just be forced in the workflow action?