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FAULT TREE ANALYSIS (can be used as (to know the logic between the event…
FAULT TREE ANALYSIS
DEFINITION
It is a graphical model of the pathways within a system that can lead to undesirable loss event
It is a top-down approach, failure analysis in undesired state
It was developed in 1962 in US by Bell Telephone Laboratories for US Air Force
It is powerful analytical tool technique for risk management
features of fault tree analysis
it uses the Boolean logic
aerospace and nuclear power plant
to know the system failure condition
to know undesired state
It is top-down approach
used in software engineering for debugging
deductive failure analysis
safety engineering and reliability
how system fail
to reduce the risk or to know the event rate
detection of single -point failure
one independent element failure causes an immediate hazard to whole system to fail
can be used as
to know the logic between the event or undesired state
helps to know if the system is stable or not
minimize the upcoming risk
optimize the resources
design tool to know input/output requirement
help in designing a system
safety performance of the complex system
It should be applied by
Defining the undesired event
different event should considered
event should be connect with appropriate gates
study of each event should be made which can induce risk and cause failure
understandingf the system
all undesired event should calculated
probabilities of event should be calculatted
constructing the fault tree
system should be analyse
event should be connected with AND and OR gates for fault tree
Evaluating the fault tree
evaluate the possible risk
try to find the improvement in the system
controling the hazards identified
by identifying decrease the probability of occurence