8.16.2012

Difference Between Flowchart and Data Flow Diagram

Difference Between Flowchart and Data Flow Diagram (DFD)
S.No
Flowchart
Data Flow Diagram (DFD)
1
Flow chart presents steps to complete a process
Data flow diagram presents the flow of data
2
Flow chart does not have any input from or output to external source
Data flow diagram describes the path of data from external source to internal store or vice versa.
3
The timing and sequence of the process is aptly shown by a flow chart
The processing of data is taking place in a particular order or several processes are taking simultaneously is not described by a data flow diagram.

4
Flow chart shows how to make a system function.

Data flow diagrams define the functionality of a system
5
Flow charts are used in designing a process
Data flow diagram are used to describe the path of data that will complete that process.

6
We have following types of flowcharts,

System flow chart

Data flow chart

Document flow chart

Program flow chart
We have following types of data flow diagrams,

Physical data flow diagrams

Logical data flow diagrams

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