Yourdon DeMarco DFD Example: Video Rental Shop Level 0 Diagram

The best way to understand Yourdon DeMarco DFD is to look at some examples of Yourdon DeMarco DFD and start drawing your own. You can now modify the Yourdon DeMarco DFD example below using Visual Paradigm's online Yourdon DeMarco DFD tool.

Benefits of Data Flow Diagram

Data-flow diagrams provide a very important tool for software engineering, for a number of reasons:

  • The system scope and boundaries are clearly indicated on the diagrams (more will be described about the boundaries of systems and each DFD later in this chapter).
  • The technique of decomposition of high level data-flow diagrams to a set of more detailed diagrams, provides an overall view of the complete system, as well as a more detailed breakdown and description of individual activities, where this is appropriate, for clarification and understanding.

How to create a Yourdon DeMarco DFD?

Yourdon DeMarco DFD can be easily created using a professional Yourdon DeMarco DFD software like Visual Paradigm Online:

  1. Create a new Yourdon DeMarco DFD.
  2. The stencil provides a rich set of Yourdon DeMarco DFD symbols you need to construct your diagram. Just drag and drop the symbols you need to your diagram and connect them with connector lines.
  3. When you finished, you can save the diagram (File > Save as) to our cloud repository for future access. You can also export your work into image (JPG, PNG, PDF, SVG, etc) and share it with your friends or co-workers.

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