Many companies began building data warehouses 10 or more years ago. These companies have established best practices for building, deploying, managing and growing data warehouse (DW) and business intelligence (BI) applications. Most of these organizations with "mature" data warehousing environments have much to teach us about the "dos" and "don'ts" of data warehousing. This column discusses two of the "don'ts."

Mistake #1: No Active Participation by Key Business Experts: Many data warehousing professionals understand the need to keep the business community involved in their DW programs. Unfortunately, few implement programs to engage business subject-matter experts, and few adhere to such programs in practice.

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