[SystemSafety] COTS display certification

[jean-louis Boulanger]

It's not mistake ...
IEC 61508 said some things ... CENELEC said another think and DO xxxx a
different thing
in my message I said that I work in railway ...

Yes an information is used and produced by a function and the data could
have a SIL associated that required some process to produce and to guaranty
....
perhaps you dont work in real world ;-)


2016-07-26 19:21 GMT+02:00 Peter Bernard Ladkin <ladkin at rvs.uni-bielefeld.de
>:

>
>
> On 2016-07-26 18:33 , jean-louis Boulanger wrote:
> > In new OCC system, some vital information are displayed on control
> screen and this informations is
> > SIL x or DAL x.
>
> Sorry, such a statement is a category mistake.
>
> In IEC 61508, safety *functions* get SILs. Information is not a function,
> therefore information
> cannot get a SIL.
>
> PBL
>
> Prof. Peter Bernard Ladkin, Bielefeld, Germany
> MoreInCommon
> Je suis Charlie
> Tel+msg +49 (0)521 880 7319  www.rvs-bi.de
>
>
>
>
>
>
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-- 
Mr Jean-louis Boulanger
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