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A data flow diagram is a graphic representation of a system or porti

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A data flow diagram is a graphic representation of a
system or portion of system. It consists of data flows,
processes, sources, destinations, and stores all
described through the use of easily understood symbols.
An entire system can be described from the viewpoint of
the data it processes with only four symbol. At the same
time, data flow diagrams are powerful enough to show
parallel activities. When standard symbols limit
communication, a presentation graph, which uses symbols
of people, files, terminals, and documents, can be used to
discuss a system with users. Which kind of data flow
diagrams would a particular (manufacturing, retail, non-
profit) business use, for what purpose and why?
Solution
Answer:)
There are two types of data flow diagrams, namely,
i. Physical data flow diagram
ii. Logical data flow diagram
Physical DFDs are suitable for those businesses which are
implementation dependent and has clear definition of what
tasks are to be performed and how they are performed.
Such DFDs relies on physical characteristics that the
business has to offer. Purpose of such DFDs is to keep a

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A data flow diagram is a graphic representation of a system or portion of system. It consists of data flows, processes, sources, destinations, and stores – all described through the use of easily understood symbols. An entire system can be described from the viewpoint of the data it processes with only four symbol. At the same time, data flow diagrams are powerful enough to show parallel activities. When standard symbols limit communication, a presentation graph, which uses symbols of people, files, terminals, and documents, can be used to discuss a system with users. Which kind of data flow ...
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