[SystemSafety] Critical systems Linux

[Peter Bernard Ladkin]

On 2018-11-20 18:40 , Chris Hills wrote:
>
> And the question I asked: why do it at all when there are plenty of other
> POSIX Compliant RTOS and OS out there that have full Safety Certification to
> 61508 SIL3 and  Do178  etc.?
Just to be clear on one thing.

There is no such thing as "full Safety Certification" to IEC 61508 SIL 3. Or "certification" to IEC
61508 SIL anything. Although some organisations will write you certificates to say something looking
very much like this if you don't inquire too closely.

If you are talking software, then with SSILs you are talking "systematic capability", and this is
dependent upon the specific task the software-based safety function is performing in the specific
system for which it is written.

Civil aerospace regulations, on the other hand, can and do bestow general "appropriateness"
categories on general-purpose SW.

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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