Data ownership map

Document the authoritative sources of truth and how data propagates across the ecosystem. Flag areas where duplication or synchronization is required.

Data ownership map connecting domains, services, and sharing paths
Visualize how data flows between bounded contexts and external systems.
Data governance lifecycle showing discovery, classification, retention, and lineage
Capture responsibilities for stewardship, privacy, and compliance audits.
Establish metadata standards and automated quality checks before proliferating new data products.
When the data foundations are healthy, move into Deployment Strategies to operationalize releases safely.