[SystemSafety] SIL ratings to be scrapped?

René Senden rene.senden at gmail.com
Wed Aug 21 16:45:50 CEST 2013


Hi Chris,

 

I am afraid I am not 100% sure as to what it is you are asking..  Apparently
an industrial control systems will be developed, and someone involved in
this

undertaking reports that the usual SIL-based safety-standard will not be
used for this particular project. Instead, and I quote, “it will be replaced

by ALARP”


 

Now regarding your query
 There are already various safety-standards which
do not apply the SIL-concept, but I am sure you are aware of these
 So
 I
assume

you are interested to find out whether there is any safety-standard for
which the most recent version (still) applies the SIL-concept (or something
similar),  and for 

which the next update is known to involve “scrapping” the SIL-concept.

 

I am not aware of any such development myself but I would be most interested
in the answer to this question. May I ask which  standard was used up to now
for 

the type of industrial control system you refer to?

 

Best regards,

Rene

 

From: systemsafety-bounces at lists.techfak.uni-bielefeld.de
[mailto:systemsafety-bounces at lists.techfak.uni-bielefeld.de] On Behalf Of
Chris Hills 
Sent: woensdag 21 augustus 2013 16:26
To: 'Bielefield Safety List'
Subject: [SystemSafety] SIL ratings to be scrapped?

 

Hi all,

 

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? 

 

 

Regards 

     Chris 

    

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
Http://www.phaedsys.com <http://www.phaedsys.com/>  chills at phaedsys.com 

 

 

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