Where is the Evidence?

[FVoehl@aol.com]

In a message dated 5/7/99 12:42:26 AM, TQNELSON@aol.com wrote:

<< we don't know/haven't the data to determine if a variation is 
system caused or not (though, from WED, we can accept that 90% plus are 
system caused)>>

The above statement has given me much cause for concern over the years.  I 
have often wondered about the 90% rule of Dr. Deming's:  that 90% or more of 
variation is caused by the system.  When FPL won the Deming Prize, I asked 
Dr. Deming about this premise.  My concern was that, in the eyes of the JUSE 
counselors, perhaps as much as 50% was caused by FPL individuals who were not 
properly trained or who didn't understand the specs.  Dr. Deming did not 
reply but referred me to "Out of the Crisis" which I researched, but was not 
able to resolve this matter to my satisfaction.  My response back to him at 
the time was something like:  Where is the evidence?  To this day, I still 
have not found it although I am still looking.  I no longer accept things on 
blind faith, even from a "father-figure" like Dr. Deming.  For if our parents 
can be wrong from time to time, so can he.

Looking for comments from the DEN on this matter.

Frank Voehl (FVoehl@aol.com) 
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