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Safety Critical Systems

Safety Critical Systems. The CISS perspective. Safety critical systems. frequency. 0.01 0.1 1 10 100+. IV. fatalities. 1E-1. III. SIL1. 1E-2. II. SIL2. 1E-3. SIL3. I. 1E-4. SIL4. SW development and probabilities !!.

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Safety Critical Systems

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  1. Safety Critical Systems The CISS perspective.

  2. Safety critical systems frequency 0.01 0.1 1 10 100+ IV fatalities 1E-1 III SIL1 1E-2 II SIL2 1E-3 SIL3 I 1E-4 SIL4

  3. SW development and probabilities !! • Failure rates computed by probability calculus (for SW ?!) • Failure rates proven in use (new developments ?) • Failure rates estimated by test (how long ?, certification) • Failure rates certified by process assessment (IEC 61508)

  4. SW development(from an IEC61508 perspective)

  5. Requirements Specification

  6. Architectural Design

  7. Detailed Design

  8. Software Validation

  9. Modelling

  10. Functional Safety Certification • Technischer Überwachungs-Verein (TÜV), Rheinland • Sira Certification Service UK (CASS scheme) • (The 61508 Association, UK's Health and Safety Executive (HSE),CASS)

  11. CISS and Functional Safety • CISS comprises nearly all competences required for safety. • Development of Safety Critical Systems challenges theoretical/technical competences to their limit. • There is a need to bridge theory and industrial practice. • One Ph.D. study (Anders Jørgensen) launched 1. August 03 • Industrial cooperation wanted. • Case Study for AJ. • CISS may host/participate in industrial network.

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