Claudia would like to thank Jonathan Geiger, executive vice president at Intelligent Solutions, for his contribution to this month's column.

Maximizing data quality continues to be a significant challenge for anyone building or maintaining a data warehouse. Although data quality issues arise anywhere, they are rarely caused by the process of moving data from the source systems through the data warehouse and on into the data marts. Typically, data quality problems occur in the source systems, often originating in the business processes themselves.

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