How to draw a Data Flow Diagram (DFD) 

0:00 - General 15:14 - Context Diagram 21:00 - Level 1 Diagram 24:10 - Level 2 Diagram 26:20 - Example This is the best explaination i have ever watched. Just making a timestamp for myself cuz I know I'm gonna be back when I need to draw DFDs again :')

The best thing about +BBarters is the way he explains, his expression, movement. It seems like he is talking to me directly. The information is rich. He knows what he is saying that is why he can explain so easily.

Many dfd tutorials have come to be since the last time I checked this tutorial. But I still come back to this legend whenever necessary

One of the best tutorial ever on DFD!! The helicopter analogy was awesome! Thanx a lot...

Loved this tutorial, thank you. It is just I was searching for. A technique for thinking. Indian teachers are the best!

THIS IS SERIOUSLY VERY VERY HELPFUL....THANK YOU SIR

best explanation i have seen regarding DFDs till now

I'm a lawyer with no knowledge of IT and this helped a lot for starting my business. thanks!

Best video for this topic👏👏Someone who explains everything in English and very well, Thanks sir

Thank you for well explained about DFD. totally impressed with this lecture sir.

A very nice piece on DFD's. Can't ask for anything better than this! Thanks a lot and continue your great effort.

I m glad I found this video 😊 Thanks 💐 From 🇳🇵

this helicopter illusion is one of the best, I felt like a pilot when doing that exam☺

this video was worth watching!! Thanks a lot.. it is really helpful for beginners.

You are so passionate about teaching, hard to find teachers like you... I hope we could work together someday..

Amazing explanations!! 39 mins well spent!

This is an excellent Tutorial. Best I have seen so far. Extremely helpful . Thank you Sir.

my lab class is running, teacher asked me to draw DFD and guess what .. haha... I m currently learning it from one of the best YT video

This helped me a lot....its my SYSTEM SOFTWARE exam tomorrow and you came as life saver for me. Thank you!

This is one of the best explanations I've seen, 4 years later

Amazing video. Cracked an internship because of this. Let me know if you're in Pune sometime, I'll buy you a drink. Thanks 🔥🔥🔥

Great explanation. Highly recommend to watch.

thank you... cleared all by stucked up conceptionS regarding DFD's in just 38:42 mints !!!

The explanation of dfd is very good. Thank you for making us understand so well.

Thank you! It has helped a lot for documentation of a college project.

What a brilliant clear explanation. Doesn't get any better than this. Lovely!

Excellent video Sir . Lots of respect from Pakistan .

Explanation is speechless.... Amazing..

ok so basically we need helicopter to draw 0 level dfd.

sir your way of teaching is really awesome....

A very comprehensive video !! I appreciate your efforts. Thank you !!

thank you , better than my lecturer for sure

A very very helpful tutorial, I actually took notes from it and DFD's are so much more approachable now. Thanks!

very nice video, with detailed information, i like most the commentary teaching method

Beautifully explained

Thank you so much for making such an awesome video. Its the best video on dfd on this planet. Thanks a lot :) All the best for your life. :)

Thnku Sir very helpful..Respect from PAK

Best DFD explanation ever!!!

Learned more from you guys than from my school. Thanks!

very cool way to explain DFD

Many thanks for taking time to make and post this useful video.... you have lot of patience to tolerate such an annoying student...😁 Thank you once again.

it really helped me a lot to understand how to draw a dfd. it was demonstrated beautifully. thanks a lot for this video.

it's really great helpful tutorial , i become very satisfied ,.no need to watch more tutorial on dfd design after seeiing this...... thanks for making this video.

gem,clear explaination ❤‍🔥💫

waw!! amazing i like the way you explain it in simple terms, i hv been listening to my lecturer for 2hrs but i couldnt understand, da 38 mins is worth watching

Indeed very much informative!!! THANKS : )

Nice lecture, One note though was put the whiteboard to the side more and step out of its view so the audience can better see it. You are kinda crowding the board. Or pull the camera back and mark your spot on the floor with tape so you know how far to stand and do some test shots.

Superb teaching!!

BEST VIDEO ON THIS TOPIC....KEEP IT UP.

Thanks bro. i wish every success in life 4 u

Excellent explanation 👌

Thank you so very much for the information

I enjoyed this session I feel so involved.

This guy is better than my lecturers hahaha

Very well explained. Thank you!

Nice one. Highly Informative ..Clear all doubts

May god bless you Sir 💯

Very very nice tutorial. Thanks Alot

Thanks for such a perfect video.I want to add a little definition for processes,Their names have to be labeled with verb ,Because a process generally makes data transformation actions.

watched 1st tym ur video and really got many answers of my doubts...thank uhhhh sir

u are the best

im from sri lanka.greate lecture.thankyou very much sir.

i was in search of such a genuine tutorial and finally i got it....really helpful...thanks with ton $ ton $ ton $ .....so on

very well explained clearly this will be helpful for me in todays exam to gain 16 marks thanks

wow this explanation was really good!

Its Useful for us.......Thankssssss

sir is so.. kiddu kiddu

life saver i swear

this video is good at explaining what a DFD is, its really help me lots for my interview thanks for such great work...

nice dfd presentation

Very nice & helpful.

You said data stores are always having incoming and outgoing edges. I have seen DFDs which have only outgoing edges to a process. like , google map etc.

You are really helping me clear my semester

You are very good sir....thank you

very helpful for beginners.

Good video..it was worth watching

Great instruction, thanks. I am confused about what the process bubble really is. Should it be the name of the application that processes the data e.g. (Application ABC), or should it be the name of the process itself (e.g. Validate Data) or should it be the name of the use case e.g. Chatting functionality, blogging functionality as in your examples in the videos.

Very much Appreciated. Was very helpful for my Midterm preparation. Stay Blessed.

awesome.........explanation

Highly Informative ..Clear all doubts

awesome! Great teachin. I got it Completely. Thanks

Superb! Just what I needed!

you just cover my whole final exam. thank you

i have esay to unterstand in our dfd ..thank q thankq so much for our help thanks

Gud explanation sir ... helicopter example super

thanks sir, this dfd session is easily understand me.....

Is there an ISO or ANSI standard that's support DFD? Because what I've seen is that a process is drawn like rectangle and not a circle.?

Very useful video ...thanks

What a wonderful explanation Sir. Thank you very much for your help I really appreciate it.

Thank you very much. Was really helpful.

best explanation ; fully satisfied ;

It was a wonderfull tutorial and worth watching it. Thanks

Thnx a lot for ur precious information n teachings it helped me a lot......

Salute from Nigeria

Nicely explained

great upload.... thanks a lot for making dfd's look so simple...hope that the quality of videos improve...would also like to understand various data models of software engineering....please upload a video for the same...thanks in advance

At 31:34 instead of using multiple data flows, why didn't you just do that join?

At first i would like to thank you to make such a nice video to make to understand "How to create DFD". Really this is one of the nice video lecture. My question is - suppose in level 1 i have two complex process then how can i decompose it in further step. do i need to make two different level or in 2 nd level i should decompose both. plz suggest. its confusion i have. since you have written in your slide " Only those processes that merit being expanded need to have level 2 DFDs . Level 2 DFD completely describes any one process from the level 1 DFD."

Thank you very much, nice explanation

Thanks for help dude