[SystemSafety] WG: words you cannot use at GM

peter.sheppard at uk.transport.bombardier.com peter.sheppard at uk.transport.bombardier.com
Thu May 22 15:25:40 CEST 2014


I don't see what is wrong with "acceptably safe".  No system is ever 100% 
safe, thus an expert, professional judgement on what is acceptably safe 
has to be made.

In the UK railways it was agreed that "acceptably safe" for rail workers 
was different to what "acceptably safe" was for passengers (still can't 
call them customers!)

Regards

Peter 

Peter Sheppard
Senior Safety Engineer and Validator

Mobile: +44 7920 247931
 
  
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Peter Bernard Ladkin <ladkin at rvs.uni-bielefeld.de>
Sent by: systemsafety-bounces at lists.techfak.uni-bielefeld.de
22/05/2014 13:46

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Re: [SystemSafety] WG: words you cannot use at GM








On 2014-05-22 14:31 , Nancy Leveson wrote:
> I think saying that "acceptably safe" is safe is a ridiculous 
definition. 

Nevertheless, it is de rigeur in Europe. The UK Health and Safety 
Executive says that is how it
judges, with "acceptably safe" usually meaning a one in a million elevated 
chance of dying:
http://www.hse.gov.uk/risk/theory/r2p2.htm

PBL

Prof. Peter Bernard Ladkin, Faculty of Technology, University of 
Bielefeld, 33594 Bielefeld, Germany
Tel+msg +49 (0)521 880 7319  www.rvs.uni-bielefeld.de




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