The area composed of three standardA document that provides, for common and repeated use, rules... More deviations on either side of the centreline, or mean, of a normal distribution of data plotted on a control chart[Tool]
A graphic display of process data over time and ag... More that reflects the expected variationA change in scope or timing of work that a supplier is oblig... More in the data. See also specification limitsThe area, on either side of the centreline, or mean, of data... More.