False Positive Rate

False positive rate is the proportion of an inspection or detection system’s alerts that turn out, on investigation, not to reflect a real issue - and in practice it is one of the most important numbers determining whether engineers actually trust and use a system, regardless of how sensitive it is. A detector tuned to catch every possible anomaly but that also floods engineers with false alarms will get ignored within a few cycles; a workable system has to balance sensitivity against a false positive rate low enough that every flagged item is worth an engineer’s time to check. This is why multi-signal corroboration, rather than any single sensor’s raw sensitivity, is usually the deciding factor in a detection system’s real-world usefulness.