From: Ravi Sundaram <ravi@ansoft.com>
Subject: Re: Ariane 5 failure
Date: 1996/10/17
Date: 1996-10-17T00:00:00+00:00 [thread overview]
Message-ID: <3266741B.4DAA@ansoft.com> (raw)
In-Reply-To: 544qst$qo3@omega.gmd.de
Ralf Tilch wrote:
> The reason that the software wasn't checked:
> It was too 'expensive'?!?!.
Yeah, isn't hindsight a wonderful thing?
They, whoever were in charge of these decisions,
too knew testing is important. But it is impossible
to test every subcomponant under every possible
condition. There is simply not enough money or time
available to do that.
Take space shuttle for example. The total computing
power available on board is probably as much as used
in Nintindo gameboy. The design was frozen in 1970s.
Upgrading the computers and software would be so expensive
to test and prove they approach it with much trepidation.
Richard Feyman was examining the practices of NASA and
found that the workers who assembled some large bulkheads
had to count bolts from two refrence points. He thought
providing four reference points would simplify the job.
NASA rejected the proposal because it would involve
too many changes to the documentation, procedures and
testing. (Surely You are joking, Mr Feyman I? or II?)
So praise them for conducting a no nonsense investigation
and owning up to the mistakes. Learn to live with
failed space shots. They will become as reliable as
air travel once we have launched about 10 million rockets.
--
Ravi Sundaram.
10/17/96
PS: I am out of here. Going on vacation. Wont read followups
for a month.
(Opinions are mine, not Ansoft's.)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
next prev parent reply other threads:[~1996-10-17 0:00 UTC|newest]
Thread overview: 105+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <agrapsDy4oJH.29G@netcom.com>
1996-09-25 0:00 ` Ariane 5 failure @@ robin
1996-09-25 0:00 ` Michel OLAGNON
1996-09-25 0:00 ` Chris Morgan
1996-09-25 0:00 ` Byron Kauffman
1996-09-25 0:00 ` A. Grant
1996-09-25 0:00 ` Ken Garlington
1996-09-26 0:00 ` Byron Kauffman
1996-09-27 0:00 ` A. Grant
1996-09-26 0:00 ` Sandy McPherson
1996-09-25 0:00 ` Bob Kitzberger
1996-09-26 0:00 ` Ronald Kunne
1996-09-26 0:00 ` Matthew Heaney
1996-09-27 0:00 ` Wayne Hayes
1996-09-27 0:00 ` Richard Pattis
1996-09-29 0:00 ` Alan Brain
1996-09-29 0:00 ` Dann Corbit
1996-09-29 0:00 ` Chris McKnight
1996-09-29 0:00 ` Real-world education (was: Ariane 5 failure) Michael Feldman
1996-10-01 0:00 ` Ariane 5 failure Ken Garlington
1996-09-27 0:00 ` Ronald Kunne
1996-09-27 0:00 ` Lawrence Foard
1996-10-04 0:00 ` @@ robin
1996-09-28 0:00 ` Ken Garlington
1996-09-28 0:00 ` Ken Garlington
1996-09-29 0:00 ` Alan Brain
1996-09-29 0:00 ` Robert A Duff
1996-09-30 0:00 ` Wayne L. Beavers
1996-10-01 0:00 ` Ken Garlington
1996-10-01 0:00 ` Wayne L. Beavers
1996-10-01 0:00 ` Ken Garlington
1996-10-02 0:00 ` Sandy McPherson
1996-10-03 0:00 ` Richard A. O'Keefe
1996-10-01 0:00 ` Ken Garlington
1996-09-28 0:00 ` Ken Garlington
1996-09-27 0:00 ` Alan Brain
1996-09-28 0:00 ` Ken Garlington
1996-09-27 0:00 ` Ken Garlington
1996-09-29 0:00 ` Louis K. Scheffer
1996-09-27 0:00 ` John McCabe
1996-10-01 0:00 ` Michael Dworetsky
1996-10-04 0:00 ` Steve Bell
1996-10-07 0:00 ` Ken Garlington
1996-10-09 0:00 ` @@ robin
1996-10-09 0:00 ` Steve O'Neill
1996-10-12 0:00 ` Alan Brain
1996-10-04 0:00 ` @@ robin
1996-10-04 0:00 ` Michel OLAGNON
1996-10-09 0:00 ` @@ robin
1996-10-04 0:00 ` Joseph C Williams
1996-10-06 0:00 ` Wayne Hayes
1996-10-17 0:00 ` Ralf Tilch
1996-10-17 0:00 ` Ravi Sundaram [this message]
1996-10-22 0:00 ` shmuel
1996-10-22 0:00 ` Jim Carr
1996-10-24 0:00 ` hayim
1996-10-25 0:00 ` Ken Garlington
1996-10-25 0:00 ` Michel OLAGNON
1996-10-01 0:00 Marin David Condic, 407.796.8997, M/S 731-93
1996-10-02 0:00 ` Matthew Heaney
1996-10-04 0:00 ` Ken Garlington
1996-10-05 0:00 ` Robert Dewar
1996-10-06 0:00 ` Keith Thompson
1996-10-10 0:00 ` Ken Garlington
1996-10-14 0:00 ` Matthew Heaney
1996-10-15 0:00 ` Robert Dewar
1996-10-16 0:00 ` Ken Garlington
1996-10-18 0:00 ` Keith Thompson
1996-10-18 0:00 ` Samuel T. Harris
1996-10-21 0:00 ` Ken Garlington
1996-10-18 0:00 ` Ken Garlington
1996-10-23 0:00 ` robin
1996-10-02 0:00 ` Robert I. Eachus
1996-10-02 0:00 ` Ken Garlington
-- strict thread matches above, loose matches on Subject: below --
1996-10-01 0:00 Marin David Condic, 407.796.8997, M/S 731-93
1996-10-02 0:00 ` Ken Garlington
1996-10-01 0:00 Marin David Condic, 407.796.8997, M/S 731-93
1996-10-02 0:00 ` Alan Brain
1996-10-02 0:00 ` Ken Garlington
1996-10-02 0:00 ` Matthew Heaney
1996-10-04 0:00 ` Robert S. White
1996-10-05 0:00 ` Robert Dewar
1996-10-05 0:00 ` Alan Brain
1996-10-06 0:00 ` Robert S. White
1996-10-03 0:00 ` Alan Brain
1996-10-04 0:00 ` Ken Garlington
1996-10-03 0:00 Marin David Condic, 407.796.8997, M/S 731-93
1996-10-03 0:00 Marin David Condic, 407.796.8997, M/S 731-93
1996-10-03 0:00 Marin David Condic, 407.796.8997, M/S 731-93
1996-10-14 0:00 Marin David Condic, 407.796.8997, M/S 731-93
1996-10-15 0:00 ` Robert I. Eachus
1996-10-15 0:00 ` Robert Dewar
1996-10-16 0:00 ` Michael F Brenner
1996-10-16 0:00 ` Robert Dewar
1996-10-23 0:00 ` robin
1996-10-16 0:00 Marin David Condic, 407.796.8997, M/S 731-93
1996-10-18 0:00 ` Ken Garlington
1996-10-19 0:00 ` Frank Manning
1996-10-21 0:00 ` Norman H. Cohen
1996-10-21 0:00 Marin David Condic, 407.796.8997, M/S 731-93
1996-10-22 0:00 ` Adam Beneschan
1996-10-28 0:00 Marin David Condic, 561.796.8997, M/S 731-93
1996-10-28 0:00 Marin David Condic, 561.796.8997, M/S 731-93
1996-10-29 0:00 ` Ken Garlington
1996-11-08 0:00 ` robin
1996-10-31 0:00 Marin David Condic, 561.796.8997, M/S 731-93
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