Why the annual inspection was never going to be enough
The arithmetic of sampling a system that fails continuously — and why 75% is not a surprising number.
·5 min
Topics
Inspect once a year and you have one observation of a system that changes daily. The gap between what an inspection tells you and what is true is not a failure of the inspector. It is a property of sampling.
Failure is not an event
A fire door does not fail at a moment you can schedule around. Hardware drifts, closers weaken, and a door held open on a warm afternoon is non-compliant for exactly as long as nobody walks past it.
Placeholder copy. The 75% statistic requires a published source before this is fit to publish.
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