[SystemSafety] Who applies risk acceptance principles - Part 2

M Mencke menckem at gmail.com
Thu Sep 20 10:52:43 CEST 2012


Hello everybody,

A couple of months ago I started a thread under the subject "Who applies
risk acceptance principles?", particularly in the railway field. With "who"
I was referring to whether the client or the supplier should define what is
a reasonable Tolerable Hazard Rate for a hazard associated and the risk
associated with that hazard. Some people interpreted the question as "who"
(in general) applies Probabilistic Risk Assessment.

Recently I have found some further answers to that question, particularly
since a report regarding the revision of EC 352/2009 has been published. It
is named "ERA_REC_02-2012_SAF - Accompanying Report on revision of CSM on
risk assessment.doc".

The report confirms what I already suspected - there aren't any harmonised
Risk Acceptance Criteria for Technical Systems for Railway, except for
failures of functions with potential for catastrophic failure (4.3.1). They
are only applied in aviation, nuclear and maritime sectors (Section 3.4.3).

I would recommend this report to anyone working in railway RAMS. Its title
is "Agency report on the experience with the existing regulation (EC)
No352/2009 on a common safety method on risk evaluation and assessment and
on the revision of that regulation".

Kind Regards,

Myriam
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