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911 user
Join Date: Sep 2001
Location: East of Eden, West of the Sun
Posts: 2,411
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You may find these articles interesting
http://www.qualitydigest.com/jan98/html/spctool.html
http://www.qualitydigest.com/apr99/html/spcguide.html
You can also do a search on quality digest magazine.
http://www.qualitydigest.com/search.shtml
Then, when you're an expert, you can start faking your charts properly like half my clients do  
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Where once the giants walked now Mickey Mouse is king.
My other car is also a Porsche.
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