From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.3 required=5.0 tests=BAYES_00,INVALID_MSGID autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: fac41,a48e5b99425d742a X-Google-Attributes: gidfac41,public X-Google-Thread: 103376,a48e5b99425d742a X-Google-Attributes: gid103376,public X-Google-Thread: f43e6,a48e5b99425d742a X-Google-Attributes: gidf43e6,public X-Google-Thread: 1108a1,5da92b52f6784b63 X-Google-Attributes: gid1108a1,public X-Google-Thread: ffc1e,a48e5b99425d742a X-Google-Attributes: gidffc1e,public X-Google-Thread: 107d55,a48e5b99425d742a X-Google-Attributes: gid107d55,public From: crocker@tamarin.cig.mot.com (Ron Crocker) Subject: Re: Papers on the Ariane-5 crash and Design by Contract Date: 1997/04/08 Message-ID: <5iecvg$fra$1@trotsky.cig.mot.com>#1/1 X-Deja-AN: 231983989 References: <332B5495.167EB0E7@eiffel.com> <332DA14C.41C67EA6@eiffel.com> <332ef323.948774@news.demon.co.uk> <332F6411.4261@arlington.net> Organization: Cellular Infrastructure Group, Motorola Newsgroups: comp.lang.eiffel,comp.object,comp.software-eng,comp.programming.threads,comp.lang.ada,comp.lang.java.tech Date: 1997-04-08T00:00:00+00:00 List-Id: In article <332F6411.4261@arlington.net>, Ray McVay wrote: >John McCabe wrote: >> >> Bertrand Meyer wrote: >> >> >The real problem was that the assertion was not part of the software. >> >> No - the real problem was that the developers were _not_ provided with >> Ariane 5 trajectory information which should have been used in the >> analysis. >> >> Best Regards >> John McCabe > >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! I heard this the other day: All the really important mistakes are made the first day. I don't know who to attribute it to, but it is once again applicable. -- Ron Crocker Motorola Cellular Infrastructure Group (847) 632-4752 [FAX: (847) 632-6064] crocker@mot.com