Data Flow Diagrams (DFDs)

Data Flow Diagrams (DFDs) are graphical representations that map out the flow of information within a system. They focus on the movement of data between processes, data stores, and external entities, rather than the timing of events. DFDs are instrumental in understanding how data inputs are transformed into outputs through various processing steps, which is essential for system analysis and design. In the context of process modeling and analysis, DFDs help business analysts visualize the functional requirements of a system. They break down complex processes into more manageable sub-processes, illustrating how data is processed and shared across different components. This decomposition aids in identifying redundancies, inefficiencies, and potential security risks associated with data handling. DFDs are structured hierarchically, starting with a high-level overview (Context Diagram) and delving into more detailed levels (Level 1, Level 2 diagrams, etc.). This approach allows stakeholders to grasp both the big picture and the intricacies of the system. By providing a clear map of data flows, DFDs facilitate better decision-making regarding system improvements, integration points, and optimization of data processing activities.