Data Flow Diagram Process


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Data Flow Diagram (DFD) in the structured-systems analysis

"Data flow diagrams are one of the three essential perspectives of the structured-systems analysis and design method SSADM. The sponsor of a project and the end users will need to be briefed and consulted throughout all stages of a system's evolution. With a data flow diagram, users are able to visualize how the system will operate, what the system will accomplish, and how the system will be implemented. The old system's dataflow diagrams can be drawn up and compared with the new system's data flow diagrams to draw comparisons to implement a more efficient system. Data flow diagrams can be used to provide the end user with a physical idea of where the data they input ultimately has an effect upon the structure of the whole system from order to dispatch to report. How any system is developed can be determined through a data flow diagram model.

In the course of developing a set of levelled data flow diagrams the analyst/designers is forced to address how the system may be decomposed into component sub-systems, and to identify the transaction data in the data model.

Data flow diagrams can be used in both Analysis and Design phase of the SDLC.

There are different notations to draw data flow diagrams (Yourdon and Coad; Gane and Sarson), defining different visual representations for processes, data stores, data flow, and external entities." [Data flow diagram. Wikipedia]

The Data Flow Diagrams solution from the Software Development area of ConceptDraw Solution Park contains three vector stencils libraries with DFD symbols: Data flow diagram (DFD); DFD Gane-Sarson notation; and DFD Yourdon and Coad notation.

Use the Data Flow Diagrams solution to draw your own DFDs using the ConceptDraw PRO diagramming and vector drawing software.



Example 1. DFD Process of account receivable

This example is created using ConceptDraw PRO enhanced with solution Data Flow Diagrams. It shows the process of account receivable.




Data Flow Diagrams Sample:







Use Product:

  • Data Flow Diagrams Software
  • UML Diagrams Software
  • Vector Drawing Tools
  • Cross Platform Compatibility
  • Presentation Mode
  • Over 2 000 vector stencils
  • Export to vector graphics files

Use Solution:

  • Graphical representation of the "flow" of data through an information system
  • Modeling process aspects
  • An overview of the system
  • For the visualization of data processing (structured design)
  • What kinds of information will be input to and output from the system
  • Where the data will come from and go to
  • Where the data will be stored

Compatibility: Apple® OS X 10.10 or later
Microsoft® Windows® 7/8.1/10

Price: ConceptDraw PRO US$199
 
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