Re: [SystemSafety] SIL ratings to be scrapped?

From: Dominey, Alan (UK) < >
Date: Wed, 21 Aug 2013 15:58:33 +0000

I think there may have been a misunderstanding somewhere along the way here.

UK MoD implemented the use of SILs into many of their projects a few years ago and these are now being replaced by SIRs - Safety Integrity Requirements ( High / Medium / Low) . . . Don't know if this is a pointer in any direction . . .

        Many Thanks
        Alan G. Dominey
        Electrical Safety Engineer
        Torpedo Capability Contract Project Surveillance Manager
        Spearfish Safety Group

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From: systemsafety-bounces_at_xxxxxx Sent: 21 August 2013 15:26
To: 'Bielefield Safety List'
Subject: [SystemSafety] SIL ratings to be scrapped?

I have just been taking to one of my customers who do control systems for industrial systems. They have been told by someone they are doing a system for that SIL ratings will "soon be scrapped". Apparently "It will be replaced by ALARP". This seems like a completely misunderstood half a message. Though usually on this sort of thing there is a grain of reality (if miss reported or miss represented) in there somewhere.

I know I have not been paying attention over the summer but I haven't seen anything. Is there a move on any standard to change from SIL ratings for projects?



Eur Ing Chris Hills BSc CEng MIET MBCS FRGS FRSA Technical Specialist Phaedrus Systems Ltd Tel: FREEphone 0808 1800 358 Vat GB860621831 Co Reg #04120771
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systemsafety_at_xxxxxx Received on Wed Aug 21 2013 - 17:58:55 CEST

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