From: Kilgallen@SpamCop.net (Larry Kilgallen)
Subject: Re: Ariane Failure
Date: 11 Apr 2002 09:33:17 -0500
Date: 2002-04-11T09:33:17-05:00 [thread overview]
Message-ID: <Tz$ACDLOR7ku@eisner.encompasserve.org> (raw)
In-Reply-To: a93uj0$1be$1@news1.xs4all.nl
In article <a93uj0$1be$1@news1.xs4all.nl>, fdebruin@xs3.xs4all.nl (fdebruin) writes:
> For example, in the case of Ariane 501 the IRS software in the two units
> could have been developed indepently by two different companies. Maybe
> the problem would have occurred in only one of them.
>
> This will immediately raise the issue of deciding which software is
> roviding you the correct data, in case they differ. This will lead to
> some kind of arbitrator (a new single point of failure) or a third
> software package to allow majority voting.
>
> You will easily tripple the cost of your software. In addition, I am not
> convinced that the added robustness makes up for the added complexity.
> Furthemore, you are still not fully covered because your software
> specification might contain an error that will be common to all indepently
> developed software.
Just have each implementation use a different specification :-)
next prev parent reply other threads:[~2002-04-11 14:33 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <ee2a195b.0203260725.a02dbfe@posting.google.com>
2002-03-29 18:56 ` Ariane Failure Richard Riehle
2002-03-29 20:56 ` Michael Feathers
2002-03-30 1:02 ` Bill
2002-03-30 3:20 ` Keith Ray
2002-03-30 12:12 ` John Roth
2002-03-30 13:36 ` Michael Feathers
2002-04-01 15:22 ` Marin David Condic
[not found] ` <a8oo51$tsk$2@slb2.atl.mindspring.net>
2002-04-08 13:59 ` Marin David Condic
2002-04-09 12:49 ` John Roth
2002-04-09 14:58 ` Steve O'Neill
2002-04-09 15:04 ` Steve O'Neill
2002-04-09 23:00 ` John Roth
2002-04-10 12:52 ` Steve O'Neill
2002-04-10 12:59 ` Marin David Condic
2002-04-11 0:48 ` Steve O'Neill
2002-04-11 13:17 ` Marin David Condic
2002-04-11 13:47 ` Ted Dennison
2002-04-11 14:15 ` Marin David Condic
2002-04-11 12:12 ` fdebruin
2002-04-11 14:33 ` Larry Kilgallen [this message]
2002-04-11 18:16 ` Ted Dennison
2002-04-11 18:30 ` Marin David Condic
2002-04-09 19:07 ` Bill
2002-04-09 19:44 ` Marin David Condic
2002-04-01 15:08 ` Marin David Condic
2002-04-02 18:32 ` Wes Groleau
2002-04-02 18:42 ` Marin David Condic
1996-06-28 0:00 Robert B. Love
1996-07-01 0:00 ` Ken Garlington
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