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From: Richard D Riehle <laoXhai@ix.netcom.com>
Subject: Re: Ada and Java. different behaviour. casting long to int problem.
Date: 1999/06/23
Message-ID: <7kpa19$407@dfw-ixnews12.ix.netcom.com>#1/1
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X-NETCOM-Date: Tue Jun 22  7:33:45 PM CDT 1999
Newsgroups: comp.lang.ada
Date: 1999-06-22T19:33:45-05:00
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In article <37700CFC.94862F1C@mitre.org>,
	"Robert I. Eachus" <eachus@mitre.org> wrote:

>"Samuel T. Harris" wrote:
>
>> As has been said in this thread a couple of times, no feature
>> of the language was at fault either by it usage or by is
>> avoidance. The analysis, design, and implementation were all
>> based on the Ariane 4 flight trajectory and performance
>> characteristics. The practices employed are common and accepted
>> within the industry performed with due diligence as applied
>> to the Ariane 4. The problem was simply one of not reverifying
>> reused code in a new situation.
>
>    Amen!  Perfect software is no longer perfect if used outside its
>design envelope.

This reminds me of the pharmaceutical example.  Someone goes to a 
lot of trouble to create a medicine that cures some condition. The
doctor gives this perfectly good therapy to someone for whom it is
contraindicated.  The patient dies.  Arianne 4 software was apparently
contraindicated for Arianne 5.

Richard Riehle
richard@adaworks.com
http://www.adaworks.com