'Requirements spec' diaporamas de présentation

More On Data Flow Modeling

More On Data Flow Modeling. CMSC 445 Pressman Chapters 11/12. Basic idea of Dataflow Modeling. Information flow through the system is modified by a series of transformations. Dataflow diagrams (DFD) DFDs capture these transformations in graphical form. Overview of Lecture.

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Writing System Requirements

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SSADM Version 4

SSADM Version 4. Stages of SSADM v4 annotated to show main uses of the three basic diagrammatic techniques. Notice how the diagrams carry forward from stage to stage becoming transformed from the existing physical system through a logical system and eventually to the required system.

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