OK, we set the Receipt Date in the Purchase Order based on what was promised by the Vendor.  In  ODOO 14 we have it send a reminder email to the Vendor 5 days prior to arrival to confirm all is good.  If they click the link in the email to update the date it allows them to make it later and then sends us an exception alert.  So far this is perfect!

The issue I'm trying to figure out is the On-Time calculation based on the original confirmed Receipt Date or is it calculating it based on their exception date?

If it is based on the original promised date that is great!  If it is based on their updated date that  is BAD.  We need that updated date to help in planning and forecasting, but the fact they missed the original promised date still needs to be calculated in their On-Time rating so we know how to rate the vendor.

Does anyoneDoes anyone know which way this works and how best to handle our goals?