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Could You Explain... ?
Posted by: Jim Parnella Posted on: Tuesday, 2nd January 2001, 12:00 AM.
planb,
I'm e-mailing you some curves that will do better in explaining Six Sigma than the ones referenced in this week's newsletter.
What you need to realize is that Motorola studies had determined that processes will shift as much as 1.5 sigma from the desired process average. That is why 6 sigma delivers not more than 3.4 ppm defects rather than 2 parts-per-billion that would be anticipated from a centered 6 sigma process. It is because of this 1.5 sigma shift that accounts for the 3.4 ppm rather than 2 ppb.
I would have attached the charts to this message but apparently the web site doesn't allow attachments. Message Thread:  Return To Discussion ForumPost A New MessageRead the Forum Guide to Good Etiquette
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