A scale of 1 to 5 has been considered too coarse, but again 'where to stop?' 1 to 1000 gives, perhaps, a better impression of the RA of a comet strike to non-technical managers and politicians, but in these days of big numbers, there is a case for 1 to 1 million. From: McCallum, Andy [mailto:andy.mccal...@mottmac.com] Sent: Thursday, April 14, 2016 10:02 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] SV: [PSES] EU's new approach directive transitions Rich If you have not done a risk assessment previously it can be daunting - where do you draw the line with "what if". In the UK rail industry an example could be "What happens if the train is hit by a comet". Answer everyone dies. So what mitigation can you do - run trains in tunnels deep in rock so the train is protected. That's not practical so the ALARP principal is introduced (As low as reasonably practical). Also risk is about the likelihood of an event - so a comet strike chances of happening are so low that it can be ignored. Your RA could be enormous if you tried to include every risk that was possible (rumour is someone did consider a comet strike but I have not seen it!). So product knowledge and common sense need to be applied. Consider the risks for your product assign them a risk rating ( say 1 - 5 where 1 is no risk and 5 is risk of death) and then assign a likelihood (1 is incredibly unlikely and 5 is a daily occurrence). Multiply 1 by the other and you have a risk score somewhere between 1 and 25. So a comet strike is likely to a consequence of death (score 5) but is incredibly unlikely (Score 1) total risk score 5. Any reasonable mitigation? No that's the best you will get move on the next risk. Hope that helps Andy From: Gary Swale [mailto:gary.sw...@ditchwitch.com] Sent: 14 April 2016 00:48 To: EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: Re: [PSES] SV: [PSES] EU's new approach directive transitions >>I don't have experience in RA, so I guess I can't do it.<< No, not experience in RA, experience and knowledge about the product. The RA is all about presenting "what if" scenarios to product experts and the experts then work to lower the risk through design, safeguards, and information. _____
From: Richard Nute [ri...@ieee.org] Sent: Wednesday, April 13, 2016 6:19 PM To: Gary Swale; EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: RE: [PSES] SV: [PSES] EU's new approach directive transitions ". Risk Assessment is a qualitative (estimate based on experience) venture." I don't have experience in RA, so I guess I can't do it. I guess I have to hire someone who has RA experience. This is very much like the certification house manager who told me that product safety is an art that takes many years (and products) of experience to master. As a product manufacturer (compared to a certification house), my experience is limited and I would not likely master the art. Rich This email and any files transmitted with it from The Charles Machine Works, Inc. are confidential and intended solely for the use of the individual or entity to which they are addressed. If you have received this email in error please notify the sender. Our company accepts no liability for the contents of this email, or for the consequences of any actions taken on the basis of the information provided, unless that information is subsequently confirmed in writing. Please note that any views or opinions presented in this email are solely those of the author and do not necessarily represent those of the company. Finally, the recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org <mailto:emc-p...@ieee.org> > All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) <http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org <mailto:sdoug...@ieee.org> > Mike Cantwell <mcantw...@ieee.org <mailto:mcantw...@ieee.org> > For policy questions, send mail to: Jim Bacher <j.bac...@ieee.org <mailto:j.bac...@ieee.org> > David Heald <dhe...@gmail.com <mailto:dhe...@gmail.com> > - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org <mailto:emc-p...@ieee.org> > All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) <http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org <mailto:sdoug...@ieee.org> > Mike Cantwell <mcantw...@ieee.org <mailto:mcantw...@ieee.org> > For policy questions, send mail to: Jim Bacher <j.bac...@ieee.org <mailto:j.bac...@ieee.org> > David Heald <dhe...@gmail.com <mailto:dhe...@gmail.com> > - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
