Control chart- a time-ordered plot of sample statistics, used to distinguish between random and nonrandom variability Control limits- the dividing lines between random and nonrandom deviations from ...

L. Allison Jones-Farmer, Jeremy D. Ezell, Benjamin T. Hazen, Applying Control Chart Methods to Enhance Data Quality, Technometrics, Vol. 56, No. 1 (February 2014), pp ...

Key Takeaways: The three sigma limit is statistical data within three standard deviations from a mean. Three sigma limits set the upper and lower control limits in statistical quality control charts.

Youíll learn ALL about the 7 QC Tools while we work an example to demonstrate how you might use these tools in the real world.

The second section deals with the methods in more detail, describing the basis of fraction-defective charts, with detailed recommendations for sample size and interval, and normal control limits.