Flowcharts and Data Flow Diagrams (DFD) – An Introduction

30 Jan

A flowchart is a type of diagram that represents a process. These diagrams are step-by-step processes  which result in giving a solution to a problem. They always begin and end with an oval shaped symbol called a terminal. Then there’s a flow line which denoted the direction of the logic flow in the decision making process. Then there are parallelogram shaped symbols which show either an input or an output of the process. The rectangular shaped symbol denotes a process which is to be carried out and the diamond shape symbol denotes a decision to be made.

     This is an example of a very simple flowchart.


A Data Flow Diagrams (DFD) is a graphical way of representing the way in which data flows through an information system. The structured design can be used for the visualization of processing data. It shows the type of information that is used in a system through inputs and outputs, where the data comes from and goes to and where the data will be stored. Below is an example of a very simple DFD.

Data Flow Model Diagram


14 Responses to “Flowcharts and Data Flow Diagrams (DFD) – An Introduction”

  1. sad109652752 January 31, 2013 at 1:02 am #

    Nice post free flowing and easy to understand.Great use of graphs.

  2. sad111350151 January 31, 2013 at 9:21 pm #

    Great use of diagrams and colour!

  3. sad112540853 February 1, 2013 at 1:56 pm #

    I really like the structure of your blog. I like the way you describe it first and then you make it very clear with the pictures.

  4. sad111462698 February 1, 2013 at 2:26 pm #

    Short and precise, and nice use of diagrams

  5. sad111372736 February 1, 2013 at 6:30 pm #

    Well structured and easy to read. The diagrams are very well presented aswell.

  6. sad111310996 February 1, 2013 at 7:37 pm #

    Very informative illustrations

  7. sad112759089 February 1, 2013 at 11:03 pm #

    Your use of diagrams are very helpful to back up the information.

  8. sad111468572 February 2, 2013 at 12:44 am #

    the diagrams are very useful. Very easy to read and informative.

  9. sad109566511 February 2, 2013 at 4:01 pm #

    Thanks everyone 🙂

  10. sad111413042 February 2, 2013 at 4:09 pm #

    Really good blog! 🙂

  11. sad111505863 February 2, 2013 at 5:52 pm #

    Really good blog. Very informative and visual. Diagrams helped my understanding of DFDS and flow charts. 🙂

  12. sad111302881 February 3, 2013 at 6:56 am #

    Great blog!

  13. sad111310996 March 6, 2013 at 1:54 pm #

    very good!

  14. sad111318166 March 7, 2013 at 9:04 pm #

    Good Visuals 🙂

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