From: John McCabe <john@nospam.assen.demon.co.uk>
Subject: Re: Ariane 5 Failure from 1996
Date: Sat, 11 Jul 2009 17:54:29 +0100
Date: 2009-07-11T17:54:29+01:00 [thread overview]
Message-ID: <7qgh555mb9bdkkl0nvcf3f36ccsouvgcdh@4ax.com> (raw)
In-Reply-To: 2fc55a5a-02e6-4e3d-b172-fd0a0a37cd0e@k1g2000yqf.googlegroups.com
On Fri, 10 Jul 2009 13:10:05 -0700 (PDT), jonathan
<johnscpg@googlemail.com> wrote:
>
>(First, I defer to Marin Condic's analysis (search cla for: condic
>ariane 5).
>Unlike me he knows about this.)
>
>In fact I thought I was paraphasing Marin Condic's conclusions, but I
>might
>have dreamt it!
>
>I still find the summary I gave plausible: as soon as they disabled
>the
>checks on the infamous variable there is no reason why a different set
>of requirements or specifications would have to be, or would have
>been drawn up for C, Ada, Fortran etc versions of the software.
Well, yes, but my understanding was that the requirements for Ariane 5
were defined, but no one bothered to spot that they were different to
Ariane 4 in terms of the intertial reference system operation hence
reuse of the Ariane 4 SRI as is was not appropriate.
Funnily enough, I have personal experience of changing requirements
being ignored by a French person.
next prev parent reply other threads:[~2009-07-11 16:54 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-10 14:53 Ariane 5 Failure from 1996 John McCabe
2009-07-10 15:04 ` Martin
2009-07-10 15:09 ` John McCabe
2009-07-10 16:27 ` Hibou57 (Yannick Duchêne)
2009-07-10 18:17 ` John B. Matthews
2009-07-12 14:08 ` Marco
2009-07-12 14:34 ` Dmitry A. Kazakov
2009-07-13 10:03 ` John McCabe
2009-07-14 0:53 ` John B. Matthews
2009-07-14 13:49 ` Nicholas Paul Collin Gloucester
2009-07-14 15:16 ` John B. Matthews
2009-07-14 17:29 ` Nicholas Paul Collin Gloucester
2009-07-14 20:18 ` Ada in teaching (was: Ariane 5 Failure from 1996) Georg Bauhaus
2009-07-14 21:10 ` Adam Beneschan
2009-07-14 22:36 ` John B. Matthews
2009-07-14 23:42 ` Ada in teaching Georg Bauhaus
2009-07-15 1:03 ` (see below)
2009-07-15 15:08 ` John B. Matthews
2009-07-15 15:36 ` John McCabe
2009-07-15 18:28 ` John B. Matthews
2010-01-08 13:19 ` Ariane 5 Failure from 1996 Nicholas Paul Collin Gloucester
2010-01-08 17:34 ` Hibou57 (Yannick Duchêne)
2009-07-10 16:01 ` Bjarne Bäckström
2009-07-14 20:50 ` sjw
2009-07-10 15:26 ` Albrecht Käfer
2009-07-10 15:38 ` Adam Beneschan
2009-07-10 15:45 ` jonathan
2009-07-10 18:29 ` John McCabe
2009-07-10 18:44 ` John McCabe
2009-07-10 20:10 ` jonathan
2009-07-11 16:54 ` John McCabe [this message]
2009-07-14 14:33 ` Nicholas Paul Collin Gloucester
2009-07-14 14:39 ` John McCabe
2009-07-10 19:46 ` Niklas Holsti
2009-07-11 14:21 ` Albrecht Käfer
2009-07-11 16:55 ` John McCabe
2009-07-10 21:51 ` jimmaureenrogers
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