Your Coordinate Measuring Machines (CMMs), laser trackers, and hand gauges should not assume the master is "perfect." They should store a table of offsets.
The physical tool must have a tamper-proof label indicating its current version. Lasered QR codes are best, as they link directly to a digital database. If the label says "Ver. 2.0," the database must match. master tool standard ver
A Master Tool Standard should have an expiration date, even if it looks pristine. Most ISO 17025 standards require re-certification every 12 months. Your Coordinate Measuring Machines (CMMs)