When a customer connects its own MES
Suppose a customer wants counts and machine states from a packaging machine in its existing MES. The source has a cumulative counter, while the receiving system expects the output for each interval. Document the counter's meaning and reset behavior before mapping the fields. State whether timestamps use UTC or local time and how gaps appear.
Use an agreed production period to compare the machine record with the imported result. Check a normal run, a restart and a missing interval. The handover should explain why totals agree or where records are absent. That gives the customer an interface it can maintain when staff, software or service providers change.