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What is Master Data Management?
The practice of creating and maintaining one clean, authoritative version of your core business entities – customers, products, suppliers, locations – across all your systems.
What it is
Master data management (MDM) is about making sure you have one version of each important thing in your business. One version of each customer – not "J. Smith" in the CRM, "John Smith" in the accounting system, and "Smith, J." in the support ticket platform. One version of each product. One version of each supplier. Think of it like a company directory: if ten departments each keep their own contact list, you end up with outdated numbers, duplicate entries, and people calling the wrong office. MDM is the single, maintained directory that everyone references.
Why it matters for your business
Duplicate and inconsistent records are expensive. IBM estimates that bad master data costs US businesses $3.1 trillion per year. At the company level, the symptoms are familiar: marketing emails going to the same customer twice (or to someone who left two years ago), inventory counts that do not match between warehouse and ERP, supplier invoices that cannot be matched to purchase orders. A $45M Australian retail client had 40,000 customer records in their CRM – but after deduplication, only 28,000 unique customers. The 12,000 duplicates were inflating their customer acquisition metrics and hiding their true retention rate.
How we approach it
We start by profiling your master data across systems to understand the scope of the problem: how many duplicates, how many conflicts, which systems are authoritative for which fields. Then we build matching rules – using fuzzy matching, address standardisation, and business logic – to merge duplicates and create golden records. The ongoing discipline is just as important: we set up validation rules at data entry points so new duplicates do not creep back in.
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Key Takeaways
- •One clean version of each customer, product, and supplier – across every system – eliminates the most common data conflicts.
- •Duplicate records are not just messy; they inflate metrics, waste marketing spend, and hide true business performance.
- •MDM is not a one-time cleanup. It requires ongoing validation rules to prevent duplicates from recurring.
- •Start with your most impactful entity – usually customers – and expand to products and suppliers after.