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Open source components in safety critical systems

Open source components in safety critical systems. Suvi-Maaret Suomalainen 7.12.2004. Introduction QA for safety critical system QA in open source development Examples Conclusions. Content. Introduction (1/2). Background - use of safety critical system - closed automation system

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Open source components in safety critical systems

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  1. Open source components in safety critical systems Suvi-Maaret Suomalainen 7.12.2004

  2. Introduction QA for safety critical system QA in open source development Examples Conclusions Content

  3. Introduction (1/2) • Background • - use of safety critical system • - closed automation system • - quality of OSS • Motivation • - closed system • - few suppliers • - high prices

  4. Introduction (2/2) • Research Problem and objectives • Can components of the safety critical software be open source components? • Comparing OSS quality assurance to the requirements of IEC 61508 • Method • Literature study • INSPEC and IEEE databases • Scope • European IEC 61508 • Verification methods • No hardware requirements

  5. QA for safety critical system • Safety plan • software lifecycle • Testing • test plans in early phases • documentation • test tools and environments • testing independence • Testing techniques • dynamic • static • modeling

  6. QA in open source projects • No project plan • good configuration tools • change management differs • No testing plans • Different techniques • Testing independence • No documents • Highly motivated developers

  7. Examples • Most used Linux (OS and real time OS) • CVS repositories • Bug database • Documentation volunteer work • Others used in user interfaces and specification tool (not so safety critical) • NASA experiences • Project maturity • Project longevity • Flexibililty

  8. Conclusions • Differences between IEC 61508 and OSS • test plans • testing techniques mainly dynamic • documentation • change management • OSS can’t be used as such • management for the developer of the safety system • testing and documenting…

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