Thursday, August 20, 2009

Banking Data Warehousing

Large U.S. retail banks are building data warehouses and centralizing disconnected data marts. But warehouse-supported marts are proliferating, promising continued challenges to achieving a single enterprise customer view.

Despite widely reported disappointments, and some outright failures, of data warehouse initiatives, Gartner research shows that a data-warehouse-based architecture is the architecture of choice for customer information analysis and decision support among large U.S. retail banks. In a survey of U.S. retail banks with deposits of more than $1 billion, more than one-half of those with deposits of more than $4 billion said they use a data warehouse or data warehouse with associated data marts, with the percentage even higher for the very largest banks. In our research, the smaller banks (deposits between $1 billion and $4 billion) were more likely to say they use a series of unlinked data marts or rely on an operational customer information file (CIF) for analysis and decision support

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