A method of access to computer aided software engineering (CASE) tools for blind software engineers

  • Paul Blenkhorn
  • David Gareth Evans
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 860)


This paper proposes a technique to allow blind software engineers to access the information held in Computer Aided Software Engineering (CASE) tools. Such tools support systems analysis and design methods that typically encode information as hierarchically structured two-dimensional graphs. The paper discusses the problems that blind engineers face in accessing this type of information by considering the structure of system models built in one Software Engineering notation, namely Hatley-Pirbhai Real Time Structured Analysis. It introduces a long established, but not widely used, notation, N2 charts, which provide an equivalent tabular encoding for many software engineering notations. This style of presentation is used, together with talking touch tablet, to provide an interactive means for blind software engineers to access full system models.


  1. 1.
    P. Blenkhorn, D.G. Evans: A System for Reading and Producing Talking Tactile Maps and Diagrams. Ninth Annual International Conference, Technology and Persons with Disabilities, Los Angeles, March (1994)Google Scholar
  2. 2.
    G. Booch: Object-Oriented Analysis and Design With Applications. Benjamin/Cummings (1994)Google Scholar
  3. 3.
    D.J. Hatley, I.A. Pirbhai: Strategies for Real-Time System Specification. Dorset House Publishing (1987)Google Scholar
  4. 4.
    I. Jacobson: Object-Oriented Software Engineering. ACM Press (1992)Google Scholar
  5. 5.
    R. Lano: A Technique for Software and Systems Design. North-Holland Press (1979)Google Scholar
  6. 6.
    P. Loy, Y. Strapp: DFD's [sic] vs. N2 charts. ACM Sigsoft Software Engineering Notes, 18, A16–A17 (1989)Google Scholar
  7. 7.
    J. Rumbaugh et. al.: Object-Oriented Modelling and Design. Prentice-Hall (1991)Google Scholar
  8. 8.
    P.T. Ward, S.J. Mellor Structured Development for Real-Time Systems. 1, 2, 3, Yourdon Press (1985)Google Scholar
  9. 9.
    E. Yourdon: Modern Structured Analysis. Prentice-Hall (1989)Google Scholar
  10. 10.
    Tactual Graphics: Research and Resources. Aids and Appliances Review, The Carroll Center for the Blind, 14 (1984)Google Scholar
  11. 11.
    Teamwork/ACCESS User Manual, Hewlett Packard (1989)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1994

Authors and Affiliations

  • Paul Blenkhorn
    • 1
  • David Gareth Evans
    • 1
  1. 1.Technology for Disabled People Unit, Systems Engineering Group Department of ComputationUMISTManchesterEngland

Personalised recommendations