The statistical arm of Six Sigma uses the term Sigma, which is used to represent a measure of variation of a statistical population.
The term “six sigma process” comes from the notion that if one has six standard deviations between the mean of a process and the nearest specification limit, there will be practically no items that fail to meet the specifications.
It is thus important that your processes do not have too much variations. So, do you want to hear a variation story?
Ron Pereira of Lean Six Sigma Academy has a good one. Check out his two posts:
A Variation Story and Million Dollars Saved in 60 Minutes.
