Safety Critical Systems The CISS perspective.
Safety Critical Systems
Dec 30, 2015
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 !!. - PowerPoint PPT Presentation
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Safety Critical Systems
The CISS perspective.
Safety critical systems
frequency
fatalities1E-1
1E-2
1E-3
1E-4
0.01 0.1 1 10 100+
I
II
III
IV
SIL1
SIL2
SIL3
SIL4
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)
SW development(from an IEC61508 perspective)
Requirements Specification
Architectural Design
Detailed Design
Software Validation
Modelling
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)
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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