Enable Invoice Routing for Account Coding Workflow

Summary

Is anyone currently using the functionality to Enable Invoice Routing for Account Coding Workflow

Content

We are interested in implementing the "enable invoice routing for account coding workflow" to allow users to enter the coding as opposed to the AP team.  Our current workflow sends the invoice to the requestor and if the coding is not already in the system, the requestor is expected to reject the invoice and enter a note with the proper coding.  It comes back to AP to enter in the system, validate the coding and they initiate to the requestor for approval again.

Since the requestors are the ones that actually know the coding, it would be more efficient for them to enter.  However, there isn't enough documentation with this function for me to understand how the requestor would enter the coding so it gets picked up by the system and at what point it would get validated.