What 3-Way Match Actually Does   3-way match flags discrepancies between:  Purchase order  Receipt  Invoice    It identifies the problem.  It does not resolve it.    Where Work Moves After the Flag   Once flagged:  AP emails procurement  Procurement emails vendor  Follow-ups depend on reminders  Credits lag  Disputes linger    The ERP is no longer the system of action.    Why Volume Makes This Unsustainable   As invoice volume grows:  Small variances are forced through  Large