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The Lean Six Sigma Black Belt Handbook by H. James Harrington, Rich Charron, Chuck Mignosa, Frank Voehl

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Section 3

SSBB Overview

So far in this book we have concentrated on the Lean side of the LSSBB methodology. This section provides a short overview of the SSBB side of the LSSBB methodology. The term Six Sigma was originated by Bill Smith of Motorola when he convinced William J. Weisz, then COO of Motorola, that the standard of performance for all business activities should be 3.4 defects per million opportunities. This was statistically equivalent to plus-or-minus six sigma when long-term drift was considered. Previously, most process control standards were set at plus or minus three sigma, which is equivalent to 66.8 defects per million opportunities. To meet this new, more rigid requirement, Motorola implemented an extensive program, training ...

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