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.

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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[hugofourie]

Struggled to find the right information until I found this video. Great info, thanks!

[e.denise]

This is the best explanation of the different levels that I've seen. Before I couldn't understand when to use the other levels. Many thanks!🙏🙏

[andrineethling]

This is my favourite technique to use. Thank you for this video. It cleared up a couple of questions I had.

[dimplecastelino]

Thank you for explaining the Data Flow Diagram with an example. The physical and logical DFD perspective is very helpful.

[abhikgupta]

That's literally the best explanation I've seen so far! Thanks!

[Vanessaaaa-]

Wow, this tutorial really tackles Data Flow Diagrams in a way that’s easy to follow. I like how you used Amazon as a case study. It really helped connect the dots. If you’re diving into DFDs for the first time, this video is gold!

[SchandYu]

I love your video! The step-by-step example was especially helpful in understanding the concepts. The rules and best practices is a must-note too! Thanks!

[rembautimes]

Very good explanation. Documenting data flow diagrams is a regulatory requirement for banks here in Singapore and your explanation helps clarify this requirement

[TonyBeaversstudent]

Great Tutorial. Very helpful for someone new to DFD and how to visually understand it.

[tamaracopple]

I need to create a DFD for the first time tomorrow and am glad I brushed up on the conventions and bet practices. Thanks!

[dorothyb.]

I found your explanation very clear and useful. I too am doing a course in software design. It fully online but some of the concepts are quite challenging. Whats an entity and whats an attribute etc. My background is nursing but i work in health informatics and realise i need to know far more on the IMT side

[ps-]

Very simple & very good. Tnx from Russia

[osamazafar]

Hands down! the best channel for BA aspirants.

[danielchisala]

you explain so well sir with great simplicity, thank you very much, looking to more of such content

[Johann_]

Thank you very much, it is very helpful!
I wonder if there is a mean to show a "dataflow blocker" : that some entry could block the actions of the following process instead of "allowing" it.

[Iam_HumanBeing]

Just passing by your tutorial and made me finish it 👏👍

[bellatissiny]

Your explanation was amazing! Thank you so much!

[shayan]

Thanks man. This was the best video I have seen on Dataflow Diagrams. Now I think that I can handle the upcoming Software Engineering exams

[ezdakk]

This is insightful. Thank you soo much, my course mates have to see this, I'm spreading the gospel!🎉

[laviniahk]

Thank you so much for this tutorial, I was unfamiliar with DFDs and thought it would be difficult to understand but you have explained in such a detailed manner that I have grasped how to create one!