Slides - Åbo Akademi

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Failure Rate The failure rate of a system (or system component) is the mean number of failures within a given period of time The failure rate is a random variable (gives us the probability that a system, which has been operating over time t, fails over the next time unit) The failure rate of a component normally varies with time: λ(t)
Failure Rate (ctd.) Classification of failures (time-dependent): • Early failure period • Constant failure rate period • Wear-out failure period
Page 1 and 2: Software Safety Lecture 8: System R
Page 3 and 4: Reliability Definition Reliability:
Page 5 and 6: Safety-critical Systems • Pervasi
Page 7: Hardware Failures The system is sai
Page 11 and 12: Most Important Distributions Discre
Page 13 and 14: Reliability Parameters MTTF: Mean T
Page 15 and 16: Exponential Distribution The distri
Page 17 and 18: MTTF Example A system with a consta
Page 19 and 20: Example: Failure Rate Calculation F
Page 21 and 22: Series Systems Such a configuration
Page 23 and 24: Series-Parallel Combinations The mo
Page 25 and 26: M-of-N Arrangement A system consist
Page 27 and 28: Failure rate The term failure inten
Page 29 and 30: Design diversity Each variant of so

Slides - Åbo Akademi

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