[SystemSafety] Software Safety Assessment

[C. Michael Holloway]

On 7/9/15 12:31 AM, Matthew Squair wrote:
> ... See for example the issue of DO-178C, which resolved a number of 
> recognized problems with its predecessor 178B. 
I believe this sentence is misleading.  Some of the changes made in 
DO-178C were *intended to address* recognized problems in 178B. Whether 
those changes *resolved* the problems cannot be determined at this time. 
We won't begin to know until DO-178C is used in practice many times.

(As an aside, I suspect that if you asked members of the 
committee/working group that produced DO-178C what percentage of changes 
between B and C addressed 'recognized problems', you would get answers 
ranging from 1% to 50%. I'd be happy to tell people my own answer in 
private, but not on this list.)

-- 
/*cMh*/

*C. Michael Holloway*, Senior Research Engineer
Safety Critical Avionics Systems Branch, Research Directorate
NASA Langley Research Center / MS 130 Hampton VA 23681-2199 USA
office phone: +1.757.864.1701 /often forwarded to/ +1.757.598.1707

The words in this message are mine alone; neither blame nor credit NASA 
for them.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.techfak.uni-bielefeld.de/mailman/private/systemsafety/attachments/20150709/52e49f2f/attachment.html>