Why the record matters more than the tag
A tag on a machine tells you a test happened. A record tells you which machines exist, when each was tested, what failed and what was removed from service. The second is what a site actually needs, because a contractor with a well-maintained fleet and a contractor who tagged everything once look identical at the door. Ask for the register rather than inspecting individual tags.
The register also answers the question that follows an incident. If a lead is implicated in a fault, the useful question is whether that lead was in the testing cycle and when it was last checked. A contractor who can answer within a day has a system. One who has to look at the physical tag on a lead that may no longer exist does not, and that difference tends to be discovered at the worst time.
