Difference between fault tree and event tree
Difference between failure and faul
event tree: focus on potential accident scenarios
failure tree: focus on a (failure) event and its causes
failure: inability of a system to funtion as intended
fault: can be detected and corrected, failures happen because faults are not addressed
Fault Tree
Top (catastrophic) Event on top
Faults (primary, seconary, command)
primary: component function normally until an inherent failure occurs
seconary: external event causes excessuve operational stress
command: correct action executed at wrong time or place
active faults more common then active
Fault tree analysis - minimal cut sets
Cut set: collection of basic events that will cause top event
minimal cut set: cut set with no unnecessary events
Fault tree analysis - minimal cut sets (2/2)
in end, no double (“single letter kills every comb with it”)
Last changeda year ago
