# Model Drift Monitoring

> The activity of tracking a deployed model's inputs and output quality over time and alerting when they move past a threshold.

Record: `architecture:model-drift-monitoring`
Kind: activity
Layer: [Correctness Core](https://banes-lab.com/records/layer/correctness-core.md)
Severity: contextual
Scope: model-backed system, model lifecycle, operations
Canonical: https://banes-lab.com/ontology#architecture-model-drift-monitoring

Listed in [Architecture principles](https://banes-lab.com/api/records/architecture.md), after [Prompt Engineering](https://banes-lab.com/records/architecture/prompt-engineering.md) and before [Agentic Architecture](https://banes-lab.com/records/architecture/agentic-architecture.md).

## Repair

- Refactored by: Instrument Drift Monitoring
- Detected by: no ongoing evaluation of live model outputs
- Violated by: model quality assumed stable after deployment
- Measured by: drift in accuracy/quality metrics over time
- Enforced by: model governance review

## Requires

- [Model Evaluation](https://banes-lab.com/records/architecture/model-evaluation.md)

## Reinforces

- [Observability](https://banes-lab.com/records/architecture/observability.md)
- [Model Governance](https://banes-lab.com/records/architecture/model-governance.md)

## Enables

- [Degradation Detection](https://banes-lab.com/records/lexicon/degradation-detection.md)
- [Retraining Triggers](https://banes-lab.com/records/lexicon/retraining-triggers.md)

## Conflicts with

- [Deploy-and-Forget Models](https://banes-lab.com/records/lexicon/deploy-and-forget-models.md)
- [Model Drift](https://banes-lab.com/records/lexicon/model-drift.md)

## In tension with

- [Monitoring Cost](https://banes-lab.com/records/lexicon/monitoring-cost.md)

## Tensions

- [Model Drift Monitoring / Monitoring Cost](https://banes-lab.com/records/tension/model-drift-monitoring-monitoring-cost.md)

## Severity

- [contextual](https://banes-lab.com/records/vocabulary/severity-contextual.md)

## Category

- [Model Architecture](https://banes-lab.com/records/architecture-category/model-architecture.md)

## Linked from

- [Systems built around a model](https://banes-lab.com/software-architecture/scale/systems-built-around-a-model.md)
- [Model Architecture](https://banes-lab.com/ontology/principles/architecture-category-model-architecture.md)
- [Observability / Auditability / Traceability](https://banes-lab.com/ontology/principles/architecture-category-observability-auditability-traceability.md)
- [Core Vocabulary](https://banes-lab.com/ontology/lexicon/lexicon-category-core-vocabulary.md)
- [Model Architecture](https://banes-lab.com/ontology/lexicon/lexicon-category-model-architecture.md)
- [Severity levels](https://banes-lab.com/ontology/schema/the-vocabulary-severity.md)
- [The resolutions](https://banes-lab.com/ontology/schema/the-resolutions.md)