ExplainerFrom Notebook to Production · Explainer
Drift Is Three Different Failures, and One Metric Cannot See Them All
One logistic model, four test scenarios: a mean shift that broke accuracy but not AUC, added noise that hurt both, and a flipped rule that PSI could not see at all. The table, the code, and the monitoring checklist.
Ibrahim Denis Fofanah·Oct 24, 2026·9 min
