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

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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