Jonathan would like to thank Richard Blahunka, data warehouse architect at Entergy Corporation based in New Orleans, for his contributions to this column.

The Good Housekeeping Seal was instituted in 1909 and provides consumers with confidence when they buy products that have this seal. Underwriters Laboratories, Inc. (UL) has been providing another widely recognized assurance since 1903 to consumers buying products tested by this institution. With regulations such as Sarbanes-Oxley, which impose financial and prison penalties for inappropriate use of information, it is becoming increasingly important to not only have quality data, but to be in a position to defend that data. In this and the next two columns, we describe an approach for providing business users with confidence in the quality of their data warehouse information.Your company can take measures to provide a certification process. The commercial certification processes mentioned earlier have several things in common: they apply standards appropriate for the product and its usage, the group providing the certification is recognized as being capable to evaluate and certify the quality, the certification process is repeatable, and the consumers recognize and value the meaning of the certification.

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