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

[Ross - Sigma]

Peter

>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).

I see what you mean Peter. I remain very much in the same camp as Nick with
this and cannot see any way to express numerically the contribution of 
software errors to a Failure Condition.

In terms of Taxonomy there remains an issue within the aeronautic domains.
There are still many that use error, fault and failure interchangeably. 

Ross