Why the data flow diagrams are used?

Data flow diagrams (DFDs) are used to visually represent the flow of data within a system, illustrating how inputs are transformed into outputs through various processes. They help stakeholders understand complex processes, identify inefficiencies, and clarify requirements for system design and analysis. By providing a clear and concise depiction of data movement, DFDs facilitate communication among team members and enhance system documentation. Additionally, they serve as a valuable tool for both programmers and analysts in system development and troubleshooting.