Expired certificates are still presented
A customer auditing a supplier is shown a certificate. Whether it is current is on the customer to check, and often they do not, which devalues a current one.
WHY A LABORATORY WOULD WANT THIS
A certificate the lab cannot vouch for is a liability.
Calibration laboratories are accredited bodies whose value rests on their certificates meaning something. A market full of lapsed and photocopied certificates costs them directly.
Certificates get altered
A scanned certificate with a changed date is not hard to produce and is very hard for a recipient to detect. The lab's name is on it either way.
Recalibration is not prompted
The lab has no way to reach the instrument owner as validity approaches, so recalibration happens after an audit failure rather than before.
Accreditation carries the risk
When a lapsed or altered certificate causes a problem, the laboratory named on it is drawn into it regardless of what they actually issued.
A certificate that states its own validity, from a source the lab controls, protects the laboratory more than anyone.
If you calibrate instruments, or depend on them.
Still at the design stage. What would help is a picture of how validity is tracked where you work, and what a missed expiry has cost.
sari.handayani@teraberlaku.online
Tangerang, Banten