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What Are The Types Of Dfd?

Answer»

Types of DFD : DFDs are of TWO types: Physical DFD and Logical DFD. 

Physical DFD :

  • It is implementation dependent. It shows which functions are performed.
  • It provides low level details of HARDWARE, software, files, and people.
  • It depicts how the current system operates and how a system will be implemented.

Logical DFD :

  • It is implementation independent. It focuses only on the FLOW of data between processes.
  • It explains EVENTS of systems and data required by each EVENT.
  • It shows how business operates; not how the system can be implemented.

Types of DFD : DFDs are of two types: Physical DFD and Logical DFD. 

Physical DFD :

Logical DFD :


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