Recall how accuracy, precision, recall, calibration, and top-k metrics map to business decisions.
Imbalance Accuracy vs. recall for rare events Rare-event workflows usually need more than accuracy. Precision When does precision matter most? When each flagged case triggers a costly, trust-sensitive, or capacity-limited action. High precision means the action queue contains fewer false alarms. Calibration What does calibration protect? The meaning of score bands. A 0.8 score should behave like roughly 80 percent probability in the relevant context. Calibration matters when thresholds or expected-value decisions use the score as a probability. Stakeholder push "Can you just give me one model score?" The stakeholder wants simplicity. Your line I can give one headline, but…
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