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A group of circles for the various processes interconnected by arrows for the various data flows. Usually drawn hierarchal starting with DFD 0, also called the context diagram, containing exactly one circle in the center and rectangles around the edges for the various data sources & data sinks. The remaining DFDs are numbered like an outline.
Its rather obvious when you see an example, but diagrams can't be included here.
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoWelll, it depends on what subject you are working on.
For math: leaf to stem diagram, histogram, e.t.c.
For ELA, History: normal T-chart
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Data flow diagram for ATM machine?
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A Physical Data Flow Diagram is a diagram showing howparticular functions are performed within the data flow as opposed to a Logical DFD which only shows what functions are performed.
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Maybe it does not exist just for hotel management. However, you may want to take a look at the more widespread general DFD design tools such as the free Dia (http://live.gnome.org/Dia) or the commercial Visio (http://en.wikipedia.org/wiki/Microsoft_Visio).
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What is the utility of data flow diagram?
A data flow diagram (DFD) is used to show how the data flows through a program. It is used during the design phase to figure out how to get data from its source through all the processing and to its final destination or disposal. It is used later for reference like other design documents are used. An early equivalent of the data flow diagram was used on Unit Record Punchcard electromechanical data processing machines to show the flow of the decks of cards from machine to machine. The operators referenced these diagrams to make sure they knew where to take each deck of cards next. A similar diagram called a workflow diagram was developed in the 1920s to show the flow of work through a business or factory.
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