AWS SageMaker drift-triggered ML retraining architecture automates model performance monitoring and retraining when data drift is detected. Baseline statistics from initial training are compared against inference capture data via SageMaker Model Monitor, with CloudWatch Metrics feeding drift signals to CloudWatch Alarms. When drift exceeds thresholds, Lambda triggers Step Functions orchestration to initiate SageMaker Pipeline fine-tuning using the drift dataset, automatically redeploying the retrained XGBoost model to the SageMaker Endpoint. This pattern eliminates manual intervention, reduces model staleness, and maintains prediction accuracy in production. Fork this diagram on Diagrams.so to customize monitoring thresholds, add additional drift detection metrics, or integrate with your MLOps workflow. The architecture includes comprehensive observability via CloudTrail audit logs, X-Ray tracing, and CloudWatch Logs for full governance and troubleshooting.