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Preferred term

six sigma  

Definition

  • A group of quality control measures that aims to insure that there are at least six ∗standard deviations (sigmas) between the mean and the nearest specification limit. This translates into a tolerance for error of less than 4 per million. [Source: Dictionary of Statistics & Methodology; Six Sigma]

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URI

https://concepts.sagepub.com/social-science/concept/six_sigma

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