Gauges with no calibration on record can’t be selected in the inspection form — and gauges out for calibration, out of service, or lost never appear in the picker at all
Optional hard-stop policies go further: refuse the save on any overdue gauge, or require a gauge on every quantitative measurement — start with warnings, tighten when your team is ready
Calibration dates nobody can pencil-whip: last cal and verification dates are never hand-typed — they derive only from logged calibration events, and deleting an event rolls the date back to the prior evidence
Dates entered at gauge creation or CSV import become auditable baseline events automatically, so migrating from a spreadsheet leaves no evidence gap
Gauge registry with categories, locations, serial numbers, calibration and verification intervals — overdue and due-soon flagged in color, with a weekly due-soon digest email
Calibration history with certificate records
Measurement traceability: if a gauge fails calibration, find every measurement it touched in seconds
Gauges tie into inspection plans, so the right tool is specified per part