Can you take a measurement with an instrument that is overdue for calibration?

The answer is no, and everyone knows it — yet nothing changes on the instrument the day it falls due. The micrometer sits there as it did yesterday, reads, gives a number. What expired is the assurance behind that number. This is why due-date tracking is not a reminder problem but a validity problem: a measurement taken with an overdue instrument is not necessarily wrong, but it is not DEFENSIBLE. That is exactly what the auditor asks about. SenSight QMS surfaces the overdue instrument on the dashboard and does not soften the sentence: these instruments should not be used for measurement.