https://6sigma.com/six-sigma-definition/ Six Sigma Certification and Training Fri, 28 Feb 2025 10:11:39 +0000 hourly 1 https://6sigma.com/six-sigma-definition/#comment-25586 Sat, 20 Aug 2011 20:35:41 +0000 https://opexlearning.com/resources/?p=9057#comment-25586 True. 6 sigma qualified process is actually 4.5 sigma (or saying 4.5 standard deviation) in statistical, which is equal to 3.4ppm.

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