From: Ken Garlington <GarlingtonKE@lmtas.lmco.com>
Subject: Re: Papers on the Ariane-5 crash and Design by Contract
Date: 1997/03/26
Date: 1997-03-26T00:00:00+00:00 [thread overview]
Message-ID: <333963D1.77F8@lmtas.lmco.com> (raw)
In-Reply-To: 33389335.279@invest.amp.com.au
Thomas Beale wrote:
>
> Jean-Marc Jezequel wrote:
> >
> > Yes this is true. But, since the SRI was reused from Ariane4, the problem
> > is not with developers, but with the *integration* team.
>
> If the SRI is a black box, and this is taken to mean it is reusable,
I've never considered the term "black box" to be synonymous with
"reusable
in all environments." Moving away from software, a black box built for
any
Air Force aircraft may not meet the environmental conditions required
for
a Navy aircraft.
> doesn't
> that imply (by definition) that it should do its job with _any_
> trajectory
> data (or at least any data for a "reasonable" rocket trajectory)?
Once you use the word "reasonable," you have opened the door to
a potential problem.
If
> this
> is not true, then you haven't got a "reusable SRI", you have "Ariane-4
> SRI".
>
> So the assertion that the "real problem" was the decision not to supply
> Ariane-5
> trajectory data relies on the idea of the SRI not really being a
> reusable component,
> but one that "might work" or something similar.
>
> However, the fact that an explicit decision was made not to use this
> data in effect
> means that the deciders (whoever they were) tacitly deemed the SRI as
> reusable (whether
> they realised that or not). (One imagines that this would be true for
> all kinds of
> components on the Ariane-5....).
>
> So it seems that the "real problem" was one of the following:
>
> * the SRI component being deemed (knowingly or unwittingly) as reusable
> when it
> wasn't, and then the development proceeding as if it was a reusable
> component.
>
> * if the SRI component was indeed _supposed_ to be re-usable, meaning
> it should have
> worked with different datasets (among other things), then the fault
> is in the
> implementation of the SRI's notional engineering specification, i.e.
> its "contract"
> to other components.
>
> So either way, it is a re-use error, as originally claimed.
I don't think anyone has suggested otherwise?
>
> - thomas beale
--
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next prev parent reply other threads:[~1997-03-26 0:00 UTC|newest]
Thread overview: 254+ messages / expand[flat|nested] mbox.gz Atom feed top
1997-03-15 0:00 Papers on the Ariane-5 crash and Design by Contract Bertrand Meyer
[not found] ` <tz8ohcjv7cc.fsf@aimnet.com>
1997-03-16 0:00 ` Robert Dewar
1997-03-17 0:00 ` Please do not start a language war (was " Jean-Marc Jezequel
1997-03-18 0:00 ` Richard Irvine
1997-03-18 0:00 ` Ken Garlington
1997-03-19 0:00 ` Jean-Marc Jezequel
1997-03-19 0:00 ` Richard Kaiser
1997-03-21 0:00 ` Ken Garlington
1997-03-21 0:00 ` Jean-Marc Jezequel
1997-03-25 0:00 ` Ken Garlington
1997-03-26 0:00 ` Trust but verify " Robert S. White
1997-03-25 0:00 ` Bertrand Meyer
1997-03-26 0:00 ` Robb Nebbe
1997-03-27 0:00 ` Ken Garlington
1997-03-28 0:00 ` Karel Th�nissen
1997-03-28 0:00 ` Ken Garlington
1997-04-07 0:00 ` Jean-Marc Jezequel
1997-03-28 0:00 ` Jeffrey W. Stulin
1997-03-31 0:00 ` Ken Garlington
1997-03-29 0:00 ` the one and only real true kibo
[not found] ` <199703190839.JAA02652@stormbringer.irisa.fr>
1997-03-19 0:00 ` Please do not start a language war " Ken Garlington
1997-03-20 0:00 ` Robert S. White
1997-03-20 0:00 ` John L. Ahrens
1997-03-20 0:00 ` Martin Tom Brown
1997-03-21 0:00 ` Wolfgang Gellerich
1997-03-21 0:00 ` Robert S. White
1997-03-20 0:00 ` Roger T.
1997-03-21 0:00 ` Jean-Marc Jezequel
1997-03-24 0:00 ` Ken Garlington
1997-03-21 0:00 ` Ken Garlington
[not found] ` <tz8913l930b.fsf_-_@aimnet.com>
1997-03-18 0:00 ` Ariane-5: can you clarify? (Re: Please do not start a language war) Gavin Collings
1997-03-18 0:00 ` Ariane-5: can you clarify? (Re: Please do not start a language war Roedy Green
1997-03-17 0:00 ` Papers on the Ariane-5 crash and Design by Contract Nick Leaton
1997-03-17 0:00 ` Richard Kaiser
[not found] ` <tz8g1xtzx9y.fsf@aimnet.com>
1997-03-18 0:00 ` Anders Pytte
1997-03-18 0:00 ` Laurent Moussault
1997-03-18 0:00 ` Jean-Marc Jezequel
1997-03-18 0:00 ` Anders Pytte
1997-03-19 0:00 ` Programming language fanaticism! Louis Bastarache
1997-03-20 0:00 ` Anders Pytte
1997-03-20 0:00 ` Papers on the Ariane-5 crash and Design by Contract Matt Kennel (Remove 'nospam' to reply)
1997-03-24 0:00 ` Joachim Durchholz
1997-03-24 0:00 ` Anders Pytte
1997-03-26 0:00 ` Matt Kennel (Remove 'nospam' to reply)
1997-03-29 0:00 ` Anders Pytte
1997-03-29 0:00 ` Steve Furlong
1997-03-26 0:00 ` Robert Dewar
1997-03-27 0:00 ` the one and only real true kibo
1997-03-29 0:00 ` the one and only real true kibo
1997-03-29 0:00 ` Nick S Bensema
1997-03-30 0:00 ` the one and only real true kibo
1997-03-18 0:00 ` Anders Pytte
1997-03-21 0:00 ` Ken Garlington
1997-03-21 0:00 ` Bertrand Meyer
1997-03-21 0:00 ` William Clodius
1997-03-21 0:00 ` Bertrand Meyer
1997-03-23 0:00 ` the one and only real true kibo
1997-03-23 0:00 ` William Clodius
1997-03-22 0:00 ` Fergus Henderson
1997-03-22 0:00 ` Bertrand Meyer
1997-03-23 0:00 ` the one and only real true kibo
1997-03-23 0:00 ` Anders Pytte
1997-03-24 0:00 ` FUD (Re: Papers on the Ariane-5 crash and Design by Contract) Alexander Anderson
1997-03-24 0:00 ` Alexander Anderson
1997-03-23 0:00 ` Papers on the Ariane-5 crash and Design by Contract Anders Pytte
[not found] ` <3335BC24.13728473@eiffel.com>
1997-03-23 0:00 ` Bertrand Meyer
1997-03-24 0:00 ` Robert Dewar
1997-03-31 0:00 ` Ken Garlington
1997-04-01 0:00 ` Bertrand Meyer
1997-03-25 0:00 ` Ken Garlington
1997-03-24 0:00 ` the one and only real true kibo
1997-03-24 0:00 ` Ken Garlington
1997-03-24 0:00 ` John Hogg
1997-03-24 0:00 ` Ken Garlington
1997-03-26 0:00 ` Robert Dewar
1997-03-26 0:00 ` Ken Garlington
[not found] ` <E7ox17.MKx@syd.csa.com.au>
1997-03-28 0:00 ` Ken Garlington
1997-03-18 0:00 ` Richard Kaiser
1997-03-18 0:00 ` Nick Leaton
1997-03-18 0:00 ` "Paul E. Bennett"
1997-03-19 0:00 ` Nick Leaton
1997-03-24 0:00 ` Joachim Durchholz
1997-03-25 0:00 ` Robert Dewar
1997-03-31 0:00 ` Joachim Durchholz
1997-04-02 0:00 ` Robert Dewar
1997-04-03 0:00 ` Martin Tom Brown
1997-04-04 0:00 ` Jonathan Egre'
1997-04-06 0:00 ` Robert Dewar
1997-04-06 0:00 ` Nick Roberts
1997-04-04 0:00 ` Derek Clarke
1997-03-31 0:00 ` Jan Galkowski
1997-03-31 0:00 ` Alexander Anderson
1997-04-01 0:00 ` Alexander Anderson
1997-04-02 0:00 ` Ken Garlington
1997-03-20 0:00 ` John the Hamster
1997-03-18 0:00 ` Richard Kaiser
1997-03-18 0:00 ` Jean-Marc Jezequel
1997-03-19 0:00 ` Ken Garlington
1997-03-18 0:00 ` Nick Leaton
1997-03-19 0:00 ` Richard Kaiser
1997-03-19 0:00 ` Jean-Marc Jezequel
1997-03-19 0:00 ` Richard Kaiser
1997-03-19 0:00 ` Fergus Henderson
1997-03-17 0:00 ` Alexander Anderson
1997-03-17 0:00 ` Bertrand Meyer
1997-03-18 0:00 ` John McCabe
1997-03-18 0:00 ` Ray McVay
1997-03-27 0:00 ` Robert Dewar
1997-03-29 0:00 ` the one and only real true kibo
1997-03-30 0:00 ` Nick Roberts
1997-04-06 0:00 ` Doctorb
1997-04-08 0:00 ` Ron Crocker
1997-04-11 0:00 ` Richard Riehle
1997-03-17 0:00 ` Please do not start a language war (was " Jon S Anthony
1997-03-18 0:00 ` Kent Tong
1997-03-20 0:00 ` Ranan Fraer
1997-03-17 0:00 ` Robert I. Eachus
1997-03-17 0:00 ` Martin Tom Brown
1997-03-17 0:00 ` John McCabe
[not found] ` <tz8n2s1hrdc.fsf@aimnet.com>
1997-03-20 0:00 ` John McCabe
1997-03-20 0:00 ` Jean-Marc Jezequel
1997-03-20 0:00 ` John McCabe
1997-03-21 0:00 ` Niall Cooling
1997-03-21 0:00 ` Gavin Collings
1997-03-27 0:00 ` Joachim Durchholz
1997-04-03 0:00 ` Robert I. Eachus
1997-04-04 0:00 ` Derek Clarke
1997-04-04 0:00 ` Chris Beer
1997-04-03 0:00 ` Gavin Collings
1997-04-03 0:00 ` Ken Garlington
1997-04-04 0:00 ` Derek Clarke
1997-04-04 0:00 ` Derek Clarke
1997-04-06 0:00 ` Robert Dewar
1997-04-07 0:00 ` Ken Garlington
1997-04-09 0:00 ` Gavin Collings
1997-04-04 0:00 ` Ken Garlington
1997-04-04 0:00 ` Robert Dewar
1997-04-03 0:00 ` Robin Rosenberg
1997-03-24 0:00 ` Ken Garlington
1997-03-26 0:00 ` Thomas Beale
1997-03-26 0:00 ` Ken Garlington [this message]
1997-03-20 0:00 ` John McCabe
1997-03-21 0:00 ` "Paul E. Bennett"
1997-03-22 0:00 ` Nigel Tzeng
1997-03-23 0:00 ` John McCabe
1997-03-17 0:00 ` Paul Johnson
1997-03-17 0:00 ` Enrico Facchin - Sartori E.T.
1997-03-19 0:00 ` Anders Pytte
1997-03-18 0:00 ` Ken Garlington
1997-03-18 0:00 ` Tarjei Jensen
1997-03-18 0:00 ` Jon S Anthony
1997-03-18 0:00 ` Ken Garlington
1997-03-19 0:00 ` Eric M. Boyd
1997-03-19 0:00 ` Jeffrey W. Stulin
[not found] ` <3345cd60.2092398@news.sydney.apana.org.au>
1997-04-03 0:00 ` Ariane-5 crash , Eiffel and Ada Jeffrey W. Stulin
1997-04-03 0:00 ` Nick Leaton
1997-04-08 0:00 ` AdaWorks
1997-03-18 0:00 ` Papers on the Ariane-5 crash and Design by Contract Jon S Anthony
1997-03-18 0:00 ` Jon S Anthony
1997-03-19 0:00 ` Ron Forrester
1997-03-21 0:00 ` Ken Garlington
1997-03-22 0:00 ` Ron Forrester
1997-03-18 0:00 ` Jon S Anthony
1997-03-18 0:00 ` Ulrich Windl
1997-03-18 0:00 ` Robert I. Eachus
1997-03-19 0:00 ` Jon S Anthony
1997-03-19 0:00 ` Karel Th�nissen
1997-03-19 0:00 ` Ken Garlington
1997-03-20 0:00 ` Richard Kaiser
1997-03-24 0:00 ` Ken Garlington
1997-03-20 0:00 ` Martin Tom Brown
1997-03-21 0:00 ` Frank Manning
1997-03-21 0:00 ` Martin Tom Brown
1997-03-23 0:00 ` Frank Manning
1997-03-25 0:00 ` Ken Garlington
1997-03-19 0:00 ` Ken Garlington
1997-03-19 0:00 ` Ariane-5: can you clarify? (Re: Please do not start a language war) Karel Th�nissen
1997-03-19 0:00 ` Papers on the Ariane-5 crash and Design by Contract Karel Th�nissen
1997-03-19 0:00 ` Jon S Anthony
1997-03-20 0:00 ` Jean-Marc Jezequel
1997-03-24 0:00 ` Ken Garlington
1997-03-20 0:00 ` Paul Johnson
1997-03-24 0:00 ` Ken Garlington
1997-03-24 0:00 ` Design by Contract in C++ (was Re: Papers on the Ariane-5 crash and Design by Contract) Anders Pytte
1997-03-19 0:00 ` Papers on the Ariane-5 crash and Design by Contract Nick Leaton
1997-03-20 0:00 ` Ariane-5: can you clarify? (Re: Please do not start a language war) Karel Th�nissen
1997-03-20 0:00 ` Nick Leaton
1997-03-20 0:00 ` Nick Leaton
1997-03-20 0:00 ` Papers on the Ariane-5 crash and Design by Contract Robert I. Eachus
1997-03-20 0:00 ` Robert I. Eachus
1997-03-21 0:00 ` Please do not start a language war (was " Jon S Anthony
1997-03-21 0:00 ` Ulrich Windl
[not found] ` <tz8sp1qiywm.fsf@aimnet.com>
1997-03-21 0:00 ` ae59
1997-03-21 0:00 ` Alexander Anderson
1997-03-23 0:00 ` "Paul E. Bennett"
1997-03-22 0:00 ` Ariane-5: can you clarify? (Re: Please do not start a language war) Stuart Yeates
1997-03-22 0:00 ` Papers on the Ariane-5 crash and Design by Contract Jon S Anthony
1997-03-28 0:00 ` Matt Kennel (Remove 'nospam' to reply)
1997-03-22 0:00 ` Bertrand Meyer
1997-03-22 0:00 ` Anders Pytte
1997-03-23 0:00 ` Steve Furlong
1997-03-24 0:00 ` Anders Pytte
1997-03-24 0:00 ` Simulating Eiffel-style assertions (was: Papers on the Ariane-5 crash and Design by Contract) Wolfgang Reddig
1997-03-24 0:00 ` Anders Pytte
1997-03-25 0:00 ` Wolfgang Reddig
1997-03-25 0:00 ` Anders Pytte
1997-03-31 0:00 ` Joachim Durchholz
1997-03-26 0:00 ` Alan Brain
1997-03-26 0:00 ` Wolfgang Reddig
1997-03-29 0:00 ` How old time languages survive EJon
1997-03-22 0:00 ` Papers on the Ariane-5 crash and Design by Contract Bertrand Meyer
1997-03-23 0:00 ` Dale Stanbrough
[not found] ` <3335E18E.33590565@eiffel.com>
1997-03-23 0:00 ` FUD (Re: Papers on the Ariane-5 crash and Design by Contract) Bertrand Meyer
1997-03-24 0:00 ` William Grosso
1997-03-24 0:00 ` William Clodius
1997-03-24 0:00 ` Bertrand Meyer
1997-03-24 0:00 ` Brad Appleton
1997-03-24 0:00 ` Papers on the Ariane-5 crash and Design by Contract Robert Dewar
1997-03-24 0:00 ` Manners (was Re: Papers on the Ariane-5 crash and Design by Contract) Bertrand Meyer
1997-03-25 0:00 ` the one and only real true kibo
1997-03-24 0:00 ` Papers on the Ariane-5 crash and Design by Contract Ken Garlington
1997-03-27 0:00 ` Joachim Durchholz
1997-03-31 0:00 ` Ken Garlington
1997-04-06 0:00 ` Joachim Durchholz
1997-03-24 0:00 ` Ariane-5: can you clarify? (Re: Please do not start a language war) Nick Leaton
1997-03-24 0:00 ` Ken Garlington
1997-03-24 0:00 ` Papers on the Ariane-5 crash and Design by Contract Ken Garlington
1997-03-24 0:00 ` Robb Nebbe
1997-03-24 0:00 ` Ariane-5: can you clarify? (Re: Please do not start a language war) William Clodius
1997-03-24 0:00 ` Papers on the Ariane-5 crash and Design by Contract Jon S Anthony
1997-03-24 0:00 ` Ariane-5: can you clarify? (Re: Please do not start a language war) Ken Garlington
1997-03-24 0:00 ` Papers on the Ariane-5 crash and Design by Contract Ken Garlington
1997-03-24 0:00 ` Alexander Anderson
1997-03-25 0:00 ` Ariane-5: can you clarify? (Re: Please do not start a language war) Ken Garlington
1997-03-25 0:00 ` David Starr
1997-03-25 0:00 ` Ken Garlington
1997-03-25 0:00 ` Papers on the Ariane-5 crash and Design by Contract Robert I. Eachus
1997-03-26 0:00 ` Alexander Anderson
1997-03-26 0:00 ` Jon S Anthony
1997-03-26 0:00 ` Ken Garlington
1997-03-27 0:00 ` Trust but verify (was " Robert I. Eachus
1997-03-28 0:00 ` Jon S Anthony
1997-03-28 0:00 ` Trust but verify (was " Robert I. Eachus
1997-03-31 0:00 ` Ken Garlington
1997-03-18 0:00 ` Ariane-5: can you clarify? (Re: Please do not start a language war) Jon S Anthony
1997-03-19 0:00 ` Papers on the Ariane-5 crash and Design by Contract Chris Brand
1997-03-23 0:00 ` the one and only real true kibo
-- strict thread matches above, loose matches on Subject: below --
1997-03-17 0:00 Marin David Condic, 561.796.8997, M/S 731-93
1997-03-20 0:00 Marin David Condic, 561.796.8997, M/S 731-93
1997-03-25 0:00 ` Nick Roberts
1997-03-24 0:00 Marin David Condic, 561.796.8997, M/S 731-93
1997-03-27 0:00 Marin David Condic, 561.796.8997, M/S 731-93
1997-04-03 0:00 Adrian B.Y. Hoe
1997-04-05 0:00 ` Nick Roberts
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