# Master Data Management (MDM) One-sentence definition: Governance, processes, and tools to create a single, authoritative source for core entities (e.g., customer, product). ## Key Facts - Models: registry, consolidation, coexistence, centralized. - Controls: deduplication, survivorship rules, stewardship workflows. - Security: role-based access, audit, data quality SLAs. - Feeds downstream apps; reduces inconsistency and risk. - **Verify:** check official (ISC)² CBK and current exam outline. ## Exam Relevance - Pick MDM when duplicates/consistency issues cause errors. **Mnemonic:** “One master, many consumers.” ## Mini Scenario Q: Conflicting customer addresses cause shipping errors—solution? A: Implement MDM with stewardship and sync. ## Revision Checklist - Name two MDM styles. - Define survivorship. - Tie MDM to risk reduction. ## Related [[Data Quality and Integrity Controls]] · [[Data Catalogs and Metadata Management]] · [[Data Warehouse and Data Lake Security]] · [[Asset Valuation and Criticality]] · [[Data Inventory and Asset Register]] · [[Domain 2 - Index]]