Theory 24/Sensitivity vs Specificity/Anomaly detection
Alarms Trade Against Silence
The claim
Anomaly detection systems trade detection rate against false alarm rate, and the operating point should be set by the cost of response capacity, not by the algorithm.
01Mechanism
Every alert consumes response resources; a system tuned for sensitivity will exhaust the responders and lose the benefit.
02Prediction
Effective detection should peak at an intermediate alarm rate.
03Refutation
Effective detection rising with alarm rate would remove the trade-off.