Glossary term
Glossary term
Governance and Compliance
A change in the statistical properties or composition of input data over time, such as new categories, missing fields, format changes, or shifts in distributions. Data drift can degrade model performance and trustworthiness. Data drift monitoring should be specific to features that influence model decisions, not only to generic statistical change.
EvidentlyAI provides open source data drift detection with Kolmogorov-Smirnov, Jensen-Shannon, and PSI statistical tests.
COVID-19 caused dramatic data drift in retail, travel, and credit risk models as customer behavior shifted rapidly.
Microsoft Azure Machine Learning, AWS SageMaker Model Monitor, and Google Vertex AI Model Monitoring provide managed data drift detection.