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Defining Lean Six Sigma

In: Handbook on Continuous Improvement Transformation

Author

Listed:
  • Aristide Aartsengel
  • Selahattin Kurtoglu

Abstract

The word sigma is the eighteenth letter of the Greek alphabet (Σ, σ), transliterated as ‘S, s’. These symbols are used to denote a mathematical sum (Σ) and a standard deviation (σ); the term standard deviation was introduced to statistics by Karl Pearson (1894), which is a quantity calculated to indicate the extent of deviation for a group of elements as a whole from their expected central tendency. A low standard deviation indicates that the elements tend to be very close to their expected central tendency, whereas high standard deviation indicates that the elements are spread out over a large range from their expected central tendency.

Suggested Citation

  • Aristide Aartsengel & Selahattin Kurtoglu, 2013. "Defining Lean Six Sigma," Springer Books, in: Handbook on Continuous Improvement Transformation, edition 127, chapter 2, pages 7-24, Springer.
    • Handle: RePEc:spr:sprchp:978-3-642-35901-9_2
    DOI: 10.1007/978-3-642-35901-9_2
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