The Data Flow Diagram (DFD) is a graphical representation of the “flow” of information through an information system (see Figure 5), which is an interactive flow chart that displays the different ...

Data Flow Diagrams provide a clear understanding of the flow of data through the systems, processes, and users within your organization.

DFD: Physical data flow diagrams show how data flows are implemented in the system. Physical data flow diagrams are more specific and closer to being implemented.

The simplest diagramming method, called data flow diagramming, consisted of tracking changes to data as it moved from source card to printout.