Introduction to Software Testing



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Bog'liq
software-safety

“Exploding software?”

Analogies

  • Boiler technology lagged behind improvement in steam engines themselves.
  • So, too, software engineering lags behind hardware (electrical) engineering.

What to do?

  • Use time-tested, good engineering principles:
    • KISS, essential services, testing & verification, double & triple checking, safety engineering principles
  • Learn to love computers a little less. Our mistrust is fading and this is a bad thing.
  • Being careful need not stop progress, but we should consider the issues in detail.

SE foundations

  • There was little scientific understanding of the causes of boiler explosions.
  • Similarly, ours is a young discipline and we’re still working on the foundations.
    • What’s a good design?
    • high-level abstractions of software components
    • safety-critical systems
    • role of formalisms and formal methods
    • verification and validation
    • system evolution

Problems

  • We aren’t sharing as much information as we should (partly due to corporate paranoia), and there isn't that much careful, analytical data anyway.
  • Info-tech is a fast-paced, fad-happy, innovation-driven, big money game.
  • There has been little time or money for careful reflection, evaluation, and condensation.

Working on engineering foundations

  • No one denies that innovation and invention are vital, but we also need to work on the engineering foundations too:
  • We need mathematical models and careful experimentation (real-world validation)!

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