The data flow diagram is used with the structured analysis system development technique.

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The data flow diagram (DFD) is a key tool used in the structured analysis methodology, which is one of the oldest and most widely used approaches for developing information systems. DFDs are graphical representations of information flows within a system, and are used to map out the inputs, outputs, and processes involved in a business process or other system. DFDs help to identify the various data elements, sources, and destinations involved in a system, and to establish a common understanding of the overall system architecture among all stakeholders.

The Data Flow Diagram Is Used with the Structured Analysis