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Data-flow diagrams

Data-flow diagrams. Show processing steps as data flow through system Show end-to-end processing of data Intuitive notation that clients can understand Developed by DeMarco for Structured Analysis, adopted by and to other analysis methods

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Data-flow diagrams

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  1. Data-flow diagrams • Show processing steps as data flow through system • Show end-to-end processing of data • Intuitive notation that clients can understand • Developed by DeMarco for Structured Analysis, adopted by and to other analysis methods • Can show processing at different levels of abstraction from abstract to detailed. Slide 3 is a decomposition of the bolded bubble in slide 2. • Can show data interchange between sub-systems, for architectural description. See slide 4.

  2. DFD: Equipment procurement

  3. DFD: Place Equipment Order

  4. CASE toolset DFD

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