Trust by Design
You cannot fix what you cannot see. Begin with observability and measurable quality.
Data Quality Contracts
- Dimensions: completeness, validity, freshness, uniqueness, consistency.
- Thresholds: measurable rules (e.g., completeness > 98%).
- Actions: quarantine, alert, auto-rollback, graceful degradation.
Metadata that Works
- Business glossary with single definitions and owners.
- Technical metadata: schemas, partitions, indices, costs.
- Usage metadata: consumers, popularity, lineage impact.
Three Levels of Lineage
- Asset/table lineage.
- Column lineage with PII tracing.
- Model/feature lineage with approvals.
Automation Patterns
- Generate dictionary & lineage from pipelines (SQL/ETL/ELT).
- Quality gates in CI/CD to block bad changes.
- Freshness SLOs and anomaly alerts dashboards.