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Descriptions and Definitions of Quality Terms, Tools and Techniques
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Descriptions and Definitions of Quality Terms, Tools and Techniques |
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Normal (or Gaussian) distributionIt is common in processes for most measurements to cluster around a central value, with less and less measurements occurring further away from this center. For example, the distribution of holes across the target will gradually spread out from a central, most common placement, as below. The bell-shaped curve occurs surprisingly often and is consequently called a Normal distribution (or Gaussian distribution, after its discoverer, or simply Bell-curve) and has some very useful properties which can be used to help variation be understood and controlled.
See also:Histogram, Variation |
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