Data Flow Diagram EXAMPLE [How to Create Data Flow Diagrams]

A Data Flow Diagram (DFD) example is essential to understanding how to create one. That's because a unique trait of the data flow diagram is that there are several levels of the diagram, including context diagrams, level 0 data flow diagram, level 1 data flow diagram, level 2 data flow diagram, level 3 data flow diagram, and so on! Data flow diagrams (DFDs) in software engineering illustrate data transformation by modeling data sources, the key activities that process data, and how output data is used. If you need to know how to create data flow diagrams and need a data flow diagram example, this is the tutorial for you!

In this lesson, I discuss the differences between the different data flow diagram levels and how to create them using Amazon as our case study. Also, there will be an example of the various DFD levels. Business analysts can use data flow diagrams as a tool to draw inferences regarding requirements at various levels.

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A Data Flow Diagram (DFD) is used to:
- Show where data comes from and goes
- Show which activities transform data
- Show which outputs are stored in the system
- Show which outputs are utilized by other activities or entities

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