Re: "Understanding variation" and "statisticstics". Synonyms?

[WDSG@aol.com]

>- Are the terms "understanding variation" and "statistics" synonyms?

Not to me.

>- If not, what is the nature of the difference?

To me statistics includes many specific concepts, some of which would be 
included in "understanding variation."  When I think of understanding 
variation I think of general concepts that everyone in the organization 
should truly understand (to the level that their understanding of variation 
influences how they view all data).

I could come up with an explanation of why using factorial experiments to 
find interactions among variables is part of understanding variation but I do 
not think this is really the way people view things.

I think Design of Experiments (DoE), Evolutionary Operations (EVOP) and 
Failure Modes and Effects Analysis (FMEA) are useful aspects of Statistics 
that I do not really think of under the label of understanding variation.

I think you could include the concept of robustness in understanding 
variation (but again I think this is not something most people tie to 
understanding variation).  I would see this as the idea that the product or 
service would be better able to operate successfully in the real world if the 
variation of conditions in which it will actually be used was considered.

There is also plenty of stuff which is considered "statistics" which is not 
only useless but actually harmful.  I say this because I think that 
"statistics," as it is currently understood is not necessarily something we 
need to use more.  I think there are aspects of statistics that would result 
in better managed organizations, however, I think asking most of those with 
advanced degrees in statistics would be more harmful than helpful.

I think the resources include in Curious Cat Statistics Connections provide 
valuable resources for those interested in statistical thinking and Deming's 
System of Profound Knowledge.  I am especially excited about the growing 
library of documents on various topics of management improvement, including 
statistics, that can be found there.  I would appreciate any feedback on how 
to improve Curious Cat Statistics Connections.


        John Hunter
        Curious Cat Statistics Connections
        http://www.curiouscat.com/guides/stats.htm
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