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What Are The Types Of Dfd?

asked : 10 months, 22 days ago System Analysis and Design

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Visitor 1548162393 posted an answer
10 months, 22 days ago

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.
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