Analysis Tools

  • Arthur M. Langer


Chapter 2 discussed the concept of the logical equivalent, justifying and defining it by showing a functional decomposition example using data flow diagrams (DFD). In this section, we will expand upon the capabilities of the DFD by explaining its purpose, advantages, and disadvantages (described later as the good, the bad, and the ugly), and most important, how to draw and use it.


Data Element Application Logic State Transition Diagram Data Dictionary Functional Decomposition 
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  1. 5.
    Ed Yourdon, Modern Structured Analysis, Yourdon Press, pp. 134–35.Google Scholar
  2. 6.
    Tom DeMarco, Structured Analysis and System Specification, Yourdon Press, pp. 85— 86.Google Scholar
  3. 7.
    The Case method should not be confused with CASE (computer-aided software engineering) products, which is software used to automate and implement modeling tools and data repositories.Google Scholar
  4. 8.
    Microsoft Press, Computer Dictionary, 2nd ed., p. 149.Google Scholar

Copyright information

© Springer Science+Business Media New York 1997

Authors and Affiliations

  • Arthur M. Langer
    • 1
  1. 1.Division of Special ProgramsColumbia UniversityNew YorkUSA

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