[SystemSafety] Difference between software reliability and astrology

[Derek M Jones]

Mike,

> Guidance from the FAA is the software included in any FTA analysis should be assigned a failure rate of zero. The rational being that software failure rates are in general cannot be reliably estimated and thus the dependence/reliance on DO178.

Does this mean that it's not possible for anyone to report software
as the cause of a particular failure?

After all, if the failure rate is specified as zero, software can
never be considered a cause of failure.

A software failure rate of zero becomes a self fulfilling prophesy.

-- 
Derek M. Jones           Evidence-based software engineering
blog:https://shape-of-code.com