[SystemSafety] Who applies risk acceptance principles - Part 2

[Braband, Jens]

The report you quote is rather a justification of the work done by the ERA (and why they failed to propose a complete set of risk acceptance principles to the EU Commission).

Technically there are finally two proposals on the table: one was proposed by a dedicated taskforce (where I was member), which is believed by some railway operators as overly conservative, the other one was proposed by some operators (but not by all and was heavily opposed by some national safety authorities as setting too weak targets). So technically we have for all categories an upper and a lower bound, but unfortunately no consensus to put in an European regulation. However the work is continuing ....

In November there will be a (free) workshop in Gernany dealing with this and similar matters, see https://www.tu-braunschweig.de/ifev/veranstaltungen/sit/sit5 , if someone is interested

PS Note that this post expresses my personal expert opion and not necessarily the opinion of my employer or other stakeholders that I sometimes represent.


Mit freundlichen Grüßen
Jens Braband

Siemens AG
Infrastructure & Cities Sector
Mobility and Logistics Division
Rail Automation
IC MOL RA R&D RI
Ackerstr. 22
38126 Braunschweig, Deutschland
Tel.: +49 531 226-3231
Fax: +49 531 226-4879
Mobil: +49 173 6062831
mailto:jens.braband at siemens.com

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Von: systemsafety-bounces at techfak.uni-bielefeld.de [mailto:systemsafety-bounces at techfak.uni-bielefeld.de] Im Auftrag von M Mencke
Gesendet: Donnerstag, 20. September 2012 10:53
An: systemsafety at techfak.uni-bielefeld.de
Betreff: [SystemSafety] Who applies risk acceptance principles - Part 2

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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