##  [Six Sigma](/six-sigma) 

  ##  [Six Sigma](https://engineering.quantumdictionary.io/six-sigma-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A data-driven process-improvement methodology that reduces process variation and defects by applying statistical measurement, analysis and controlled improvement cycles (commonly structured as Define–Measure–Analyze–Improve–Control) so that outcomes are more predictable and aligned with customer requirements.