Re: [SystemSafety] Stupid Software Errors [was: Overflow......]

From: Andy Ashworth < >
Date: Mon, 4 May 2015 17:02:46 -0400


So safety critical software today is being developed by inexperienced personnel with little or no relevant training... I guess on the positive side, development costs are cheap :(

Sent from my iPhone

> On May 4, 2015, at 16:59, Steve Tockey <Steve.Tockey_at_xxxxxx >
>
> With the average age of developers being about 29 years old, maybe most aren't old enough. And many have no formal software education so even a discussion of such failures in a degree program would have little effect on the target population.
>
>
>
> From: Mike Ellims <michael.ellims_at_xxxxxx > Date: Monday, May 4, 2015 1:01 PM
> Cc: 'The System Safety List' <systemsafety_at_xxxxxx > Subject: Re: [SystemSafety] Stupid Software Errors [was: Overflow......]
>
> > With the established history of date/time roll-over issues, shouldn't any date be viewed with suspicion during design safety analysis appropriate defensive design measures put in place?
>
> The question is why?
> I know this issue is documented in at least one book.
> Did any of the programmers/coder on this even know about previous examples?
>
>
> From: systemsafety-bounces_at_xxxxxx > Sent: 04 May 2015 13:55
> To: M.Pont_at_xxxxxx > Cc: The System Safety List
> Subject: Re: [SystemSafety] Stupid Software Errors [was: Overflow......]
>
> Why wait until testing? With the established history of date/time roll-over issues, shouldn't any date be viewed with suspicion during design safety analysis appropriate defensive design measures put in place?
>
> Andy
>
> Sent from my iPhone
>
> On May 4, 2015, at 08:49, Michael J. Pont <M.Pont_at_xxxxxx >
> Matthew:
>
> β€œOn the other hand I don't think we should loose sight of the fact that the Boeing 'bug' was found by running a long duration simulation, not by an airliner falling out of the sky. So perhaps thanks is due to the Boeing safety or software engineer(s) who insisted on a long run endurance test and who might have actually learned something from history?”
>
> OK – but maybe next time we can ask them to do this testing before the aircraft goes into service …
>
> Michael.
>
> Michael J. Pont
> SafeTTy Systems Ltd.
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systemsafety_at_xxxxxx Received on Mon May 04 2015 - 23:02:54 CEST

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