Introduction to Reliability Engineering - Repairable and Non-Repairable Items

3 important questions on Introduction to Reliability Engineering - Repairable and Non-Repairable Items

Non-repairable item reliability

Survival probablity over expected life or for a period during its life when one failure can occur.

What other reliability charactestics can be used with non-repairable items?

  • Mean life or Mean Time To Failure (MTTF)
  • Expected life which certain percentage might have failed (percentile life)

Repairable item reliability

  • Probability that failure will not occur in the period of interest, when more than one failure can occur
  • Rate of occurrence of failures (ROCOF)
  • Failure rate (λ)(per unit time, per unit of population)
  • Mean Time Between Failures (MTBF)
    • only particular condition of a constant failure rate
    • assumption failures occur at constant rate
      • λ=(MTBF)-1

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