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Testing Safety-Related Software

A Practical Handbook

  • Stewart N. Gardiner

Table of contents

  1. Front Matter
    Pages i-ix
  2. Stewart N. Gardiner
    Pages 1-31
  3. Stewart N. Gardiner
    Pages 33-57
  4. Stewart N. Gardiner
    Pages 59-82
  5. Stewart N. Gardiner
    Pages 83-100
  6. Stewart N. Gardiner
    Pages 101-123
  7. Stewart N. Gardiner
    Pages 125-141
  8. Stewart N. Gardiner
    Pages 143-154
  9. Stewart N. Gardiner
    Pages 155-170
  10. Stewart N. Gardiner
    Pages 171-194
  11. Back Matter
    Pages 195-226

About this book

Introduction

As software is very complex, we can only test a limited range of the possible states of the software in a reasonable time frame. In 1972, Dijkstra [1] claimed that 'program testing can be used to show the pres­ ence of bugs, but never their absence' to persuade us that a testing approach alone is not acceptable. This frequently quoted statement represented our knowledge about software testing at that time, and after over 25 years intensive practice, experiment and research, although software testing has been developed into a validation and ver­ ification technique indispensable to software engineering discipline, Dijkstra's state­ ment is still valid. To gain confidence in the safety of software based systems we must therefore assess both the product and the process of its development. Testing is one of the main ways of assessing the product, but it must be seen, together with process assessment, in the context of an overall safety case. This book provides guidance on how to make best use of the limited resources available for testing and to maximise the contribution that testing of the product makes to the safety case. 1.1 Context The safety assurance of software based systems is a complex task as most fail­ ures stem from design errors committed by humans. To provide safety assur­ on the integrity of the system and put ance, evidence needs to be gathered forward as an argued case (the safety case) that the system is adequately safe.

Keywords

Interface Standards design development simulation software testing

Editors and affiliations

  • Stewart N. Gardiner
    • 1
  1. 1.George HouseGlasgowUK

Bibliographic information

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