Re: den.list-d Digest V2005 #6

[Chris Game <chrisgame@bigfoot.com>]

WyoCheek@aol.com wrote:

> The Red Bead Experiment was used to demonstrate how the system
> itself can   produce a variation in defects, and defects there
> will always be, common and   special caused,


Surely all it demonstrates is that sampling produces variation in 
the results? The samples are not the output of the process, they are 
the result of a further stage. Most trainees in a factory faced with 
this experiment in a quality training session will claim that the 
results are obvious and that sampling variation is to be expected. 
Any idea that the results are the 'fault' of the operator are easily 
dismissed.

If the idea of the experiment is to show that operators don't 
necessarily affect the results of a manufacturing process, this is 
wrong. However automatic the process is, wherever humans are 
involved their attitudes and diligence make a difference - this is 
common experience in any factory.

I'm still far from convinced that spending a couple of hours out of 
a (usually too) short quality training session on the RBE pays off.

Regds, Chris Game.