From: Gerold Keefer <gkeefer@...>
Date: 2001-12-11T05:40:19+09:00
Subject: [ruby-talk:28136] Re: John Roth dolt (  Re: A challenge to proponents of Unit Testing. )

Robert Oliver wrote:

> Secondly, MTBF is a useful concept that relates to observed behaviour.

actually, reliability considerations do make sense for software *systems*.
they do not make sense for trivial functions or methods.
MTBF makes sense if there is a corresponding usage profile given.
the basic measure shoud be transactions/operations per failure.
the most comprehensise work done in this area is what john musa
is publishing.

regards,

gerold

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