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Examples: FMEA
TÜV SÜD Rail GmbH
Slide 20
FUNCTIONAL SAFETY 2014 London
5th Nov. 2014
FMEA fault
input
Safe
detected failure
No Effect
fault
Dangerous
undetected failure
Is fault
detected?
Does fault affect
ability to
execute DSS?
Is fault related to DSS?
Safe
undetected failure
Dangerous
detected failure
No
Yes
Yes
Yes
No
Is fault
detected?
Yes
No
Safe faults
Dangerous faults
DSS=Defined Safe State
No