RU ITEC421- Dependability Analysis

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Across
  1. 2. faults trees provide a _____ and elegant representation
  2. 7. this uses what if questions
  3. 8. these type of faults are the most likely to cause failures
  4. 12. fmeca is a forward ______ technique
  5. 14. is when multiple layers of protection are used so if one fails others still will try to protect the system (contains – for space)
  6. 15. the ______-_____ model is the visual representation which shows layers of defense each containing holes (contains – for space)
  7. 16. type of interlock that uses physical switches alongside safety
  8. 17. used to review & verify the accuracy of fault trees
  9. 18. hazards arise due to several events occurring
  10. 19. an abbreviation for the technique used to analyze events leading to a hazard
  11. 20. this gate is used for when multiple events occur to trigger a hazard
Down
  1. 1. logical combination of basic events (contains – for space)
  2. 3. this gate is used when any one event can lead to a hazard
  3. 4. a combination of basic events
  4. 5. this tree is used for security breaches (contains – for space)
  5. 6. a _____ fault tree is used to analyze not wanted software outputs
  6. 9. prevents hazards even if the software fails
  7. 10. when inspecting a fault tree, you must be thorough and ______
  8. 11. stands for failure modes, effects, and criticality analysis
  9. 13. something that happens to the system which can be treated as an indivisible action (contains – for space)