Analytics Tuning / False-Alarm Checklist — One-Page Reference

How to tune deployed video analytics so the alerts stay trustworthy, on one page: the vocabulary (false positive vs false negative; precision = TP/(TP+FP), recall = TP/(TP+FN); accuracy is a range, never 100%); the confidence-threshold dial and how to set the operating point by the cost of a miss vs a false alarm (recall-first for perimeters, precision for counting/watch-lists); the false-alarm filter cascade (object classification ~90% cut, then zones, direction, object-size + calibration, dwel