Define the sources
Name the order record, fulfillment event, carrier update, customer message, and period being compared. Reconciliation needs a shared key and a stated expected relationship.
Classify the mismatch
Separate timing delay, missing scan, incorrect field, duplicate event, and unresolved exception. Do not infer a delivery outcome from one stale status.
Route customer impact
Prepare the evidence, promised date, current uncertainty, and permitted response for the support owner. Refunds, replacements, and new promises remain controlled decisions.