From: Wes Groleau <wesgroleau@spamcop.net>
Subject: Re: ANNOUNCE: Ada success story in IEEE Software
Date: Thu, 10 Jan 2002 10:12:06 -0500
Date: 2002-01-10T10:12:06-05:00 [thread overview]
Message-ID: <3C3DAF46.F75BBD@spamcop.net> (raw)
In-Reply-To: VS2%7.287$AG.113359008@newssvr12.news.prodigy.com
Pat Rogers wrote:
> In a study described in a paper published in 1986, Herbert and Myron Hecht found
> that for each million lines of code, 20,000 bugs existed. Normally 90% would be
> found by testing. Another 200 would be found during the first year of operation
> by users, leaving 18,000 undetected bugs. Regular maintenance would fix 200
> bugs, but also introduce 200 new ones.
This confuses me. Typos?
Are the 90% found in testing not fixed? How are 18,000 of them
still undetected a year after release.
And how can any study detect 18,000 bugs that neither the testers
nor the users can detect?
--
Wes Groleau
http://freepages.rootsweb.com/~wgroleau
next prev parent reply other threads:[~2002-01-10 15:12 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-08 11:16 ANNOUNCE: Ada success story in IEEE Software Rod Chapman
2002-01-08 12:12 ` Dale Stanbrough
2002-01-08 12:48 ` Martin Dowie
2002-01-08 14:20 ` Ted Dennison
2002-01-09 21:16 ` Jeffrey Carter
2002-01-09 21:28 ` Larry Kilgallen
2002-01-09 21:46 ` Pat Rogers
2002-01-10 15:12 ` Wes Groleau [this message]
2002-01-10 15:38 ` Pat Rogers
2002-01-08 14:58 ` Larry Kilgallen
2002-01-08 17:45 ` Rod Chapman
2002-01-08 19:43 ` Larry Kilgallen
2002-01-11 10:37 ` Ian
2002-01-11 12:03 ` Larry Kilgallen
[not found] ` <ce804us8gj7mfcdpo5529m490ihichrg4a@borpin.co.uk>
2002-01-14 15:33 ` John English
2002-01-14 22:42 ` Rod Chapman
2002-01-16 12:50 ` John English
2002-01-17 8:49 ` Rod Chapman
2002-01-17 10:18 ` John English
2002-02-06 10:10 ` Rod Chapman
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