Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!island!grenada!christmas!rtm
From: rtm@christmas.UUCP (Richard Minner)
Newsgroups: comp.software-eng
Subject: Re: Effect of execution-speed on reliability/testing
Message-ID: <25@christmas.UUCP>
Date: 12 Jan 91 07:57:43 GMT
References: <1990Dec19.102005.11830@engin.umich.edu> <470@eiffel.UUCP> <14141@uswat.UUCP> <11541@pt.cs.cmu.edu>
Reply-To: rtm@island.COM (Richard Minner)
Organization: Island Graphics, Sacramento, California
Lines: 16

In article <11541@pt.cs.cmu.edu> tgl@g.gp.cs.cmu.edu (Tom Lane) writes:
>P. J. Plauger ... the Seventy Percent Rule:
>	The cost of programming any resource rises rapidly once you
>	use up about 70% of that resource.
>I'm not sure where Plauger got the 70% figure from; he cites no
>references.  ...

I'd guess he used the Dave Barry method: "based on a study in which
[he] wrote down numbers until one of them looked about right."

But seriously, Plauger says "about 70%", and I don't doubt he
has enough experience to make such general claims.  It looks
about right to me.  Good Rule -- I'll remember it.
-- 
Richard Minner  rtm@island.COM  {uunet,sun,well}!island!rtm
Island Graphics Corporation  Sacramento, CA  (916) 736-1323