411 REFERENCE · Wiktionary
Six Sigma
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
A reference to the fraction of a normal curve that lies within six standard deviations of the mean, used to represent a defect rate.
Proper noun
Six Sigma
en business A set of techniques and tools for process improvement.
See also
en statistically significant