Published October 24, 2026
| Version v1
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Churn Model Drift: Population Stability Index (PSI) Over 0.2 Retrain vs Recalibrate 2026
Authors/Creators
Description
PSI over 0.2 signals churn model drift; recalibrate when covariate drift stays under 0.3, retrain if top features exceed 0.3 or AUC drops 0.03.
Independent technical note mirroring the canonical version: https://bteanalytics.co/blog/churn-model-drift-population-stability-index-psi-over-02-retrain-vs-recalibrate-2026.php
Notes
Independent analysis; not peer-reviewed.