How often does a sensor fire when nothing is wrong?
https://github.com/research-farm/construct/blob/main/notes/walkthrough/09_X4_OCCLUSION_WATCH.md
An alert count has no meaning without the population of ordinary events around it. A sensor may catch a known condition and still be unsuitable for standing use if it fires across routine work.
What the alarm costs
Every alarm asks for attention. False alarms spend that attention without improving the decision. Over time, the operator either follows a noisy instrument or learns to ignore it.
A useful sensor should identify a smaller route to the relevant evidence than reading everything would require. It should also remain quiet often enough that its signal changes what someone inspects or does.
Questions to carry forward
What is the normal traffic denominator? What is the false-alarm rate? Does the alert arrive before a person names the problem? Does following it reduce the cost of investigation? What happens when it points the wrong way?
A sensor earns its place through selective attention, not through the number of times it speaks.