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From: dewar@merv.cs.nyu.edu (Robert Dewar)
Subject: Re: Papers on the Ariane-5 crash and Design by Contract
Date: 1997/03/27
Message-ID: <dewar.859439125@merv>#1/1
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References: <332B5495.167EB0E7@eiffel.com> <tz8ohcjv7cc.fsf@aimnet.com>
 <332D113B.4A64@calfp.co.uk> <EACHUS.97Mar17120250@spectre.mitre.org>
 <332DA14C.41C67EA6@eiffel.com> <332ef323.948774@news.demon.co.uk>
 <332F6411.4261@arlington.net>
Organization: New York University
Newsgroups: 
 comp.lang.eiffel,comp.object,comp.software-eng,comp.programming.threads,comp.lang.ada,comp.lang.java.tech
Date: 1997-03-27T00:00:00+00:00
List-Id: <comp.lang.ada>


Ray said

<<Finally!  Thank you, sir.  It was obvious from reading the report that
was pointed out several months ago by a post in this newsgroup that this
was a wonderful example of a failure WAY early in the lifecycle.  It had
nothing to do with design or construction and everything to do with a
bogus specification.  They were in effect designing a control system for
a completely different rocket than the one in which the system was used!>>

Indeed, and in such a case, tightening up the methodology for encoding the
specification is not likely to be helpful. It can even be harmful if it
results in diverting effort into a non-useful area!