What is SIX SIGMA?
What is Lean Six Sigma?
WHAT IS SIX SIGMA?(什么是六西格玛)
六西格玛流程管理是什么/What is Six Sigma Process Management?
什么是六西格玛（签名珍藏本）/What Is Six Sigma?
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Learning Into Six Sigma
Six Sigma For Dummies 9780764567988
Six Sigma(ISBN=9780385494380)
Six Sigma For Everyone 9780471281566
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