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Warehouse Data Earns Its Keep: Page 4 of 8

MasterCard built its own data-scrubbing tool that searches for and analyzes consistencies and anomalies. If it finds 20 Sam's charges from more than one Sam's retailer, it sorts and labels them appropriately. Even after the dirty data

is cleaned, the next step--measuring the data's validity--isn't so simple. "That's a hard one to go after," Alkhalaf says. "How do you know your data quality today is better than it was yesterday?"

Next for MasterCard is a Web interface for all its clients. "It's easier to deploy this way, and then we don't need to support the client software," Alkhalaf says. The company also will add more self-service features for clients, so they can perform more business analysis through the MasterCard portal.

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