Which statement best describes the top-down modeling approach?

• A. Describes organization and data requirements at a high level, independent of reports screens or detailed data processing requirements.
• B. Relies on a bottom-up approach by composing the system from the ground up.
• C. Focuses on physical database design.
• D. Begins with detailed reporting requirements and screen layouts.

Answer: (A)

Top-down modeling starts with outlining the business’s information needs at a high level, focusing on organization and data requirements without tying them to reports, screens, or detailed processing. This approach captures the essential data entities, relationships, and business rules early, so the overall design aligns with what the organization needs before moving into implementation details like user interfaces or physical database structures. By contrast, approaches that begin with ground-up data sources or that center on exact screen layouts and reporting formats focus on implementation specifics rather than business requirements. Therefore, describing organization and data requirements at a high level, independent of presentation or processing details, best characterizes the top-down approach.