Two amplifications on human error
1. System reliability is the total of the multiplied reliability of each
componant. Thus the system reliability of a machine with three parts a,b,
and c, is (reliability a) x (reliability b) x (reliability c). Most
people, however, will intuitively attempt to add the chances of failure of
each componant or each step in a process to establish the overall odds of
failure or accident potential. (reliability a) + (reliability b) +
(reliability c).
2. It is normally very easy to find the reliability of each componant in
a machine. It is normally very difficult to find all the componants of an
interactive process between groups of people. It is not math that stands
in our way but awareness.
-- Lon Badgett lonbadgett@aol.comLearning-org -- An Internet Dialog on Learning Organizations For info: <rkarash@karash.com> -or- <http://world.std.com/~lo/>