[SystemSafety] A question about ISO26262
David Haworth
david.haworth at elektrobit.com
Thu Feb 16 11:37:37 CET 2017
Hi everyone,
I've just been reading in detail the definition of freedom
from interference given in ISO26262, and it occurred to me
that the definition might not be exactly what was intended.
The following definitions are taken from ISO 26262-1:2011
but the 2016 edition is not significantly different.
"Freedon from interference" means:
absence of cascading failures between two or more elements that
could lead to the violation of a safety requirement
where a "cascading failure" is:
failure of an element of an item causing another element or
elements of the same item to fail
and "failure" means:
termination of the ability of an element to perform a function
as required
However, it is possible to imagine scenarios where, in the absence
of a protection mechanism, an element causes another element to fail
while still continuing to perform its own function flawlessly.
Any thoughts on the matter?
All the best,
Dave
--
David Haworth OS Kernel Developer david.haworth at elektrobit.com
Elektrobit Automotive GmbH Tel: +49 9131 7701-6154
Am Wolfsmantel 46, 91058 Erlangen, Germany Fax: +49 9131 7701-6333
Geschäftsführer: Alexander Kocher, Gregor Zink Amtsgericht Fürth HRB 4886
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