The document discusses requirements gathering for data warehousing projects. It emphasizes that requirements for data warehousing are different than for operational systems, as data warehousing is meant to provide strategic information rather than capture data. While users may have trouble defining their exact needs, they can identify important business dimensions and measurements. Gathering requirements involves open-ended interviews with various stakeholders to understand objectives, issues, anticipated usage, and success metrics. Proper requirements form the basis for all subsequent development phases of the data warehouse.