William wishes to thank Dan Stanford for his contributions to this month's column.

Requirements analysis is fundamental to the design and development of business intelligence. The user requirements drive decisions about the data to incorporate in the data warehouse, how to organize (dimension) the data and how often to refresh the data. User requirements also determine the type of tool required and how the user will interact with the data. Data granularity decisions should not be driven simply by the availability of data -- the users should have a need for the data beyond their current abilities.

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