[SystemSafety] Fault, Failure and Reliability Again (short)

[Peter Bernard Ladkin]

Ross,

On 2015-03-04 15:07 , Ross - Sigma wrote:
> From an aeronautical software perspective it is the contribution of software
> to aircraft level Failure Conditions that is considered. No attempt is made
> to quantify that contribution numerically. ....
> I don't see any need to change or rewrite any of the aeronautical software
> standards.

I think you've missed the point.

I didn't say "standards", I said certification requirements. Those are, at least in the US, Federal
Regulations, not standards. They set numerical requirements on rate of occurrence of dangerous
failures; those are given qualitatively but they are assigned quantitative equivalents elsewhere
(oddly, in the acceptable means of compliance).

PBL

Prof. Peter Bernard Ladkin, Faculty of Technology, University of Bielefeld, 33594 Bielefeld, Germany
Je suis Charlie
Tel+msg +49 (0)521 880 7319  www.rvs.uni-bielefeld.de