Six Sigma, a quality-control methodology first developed for manufacturing, is now used by business and organizations of all types.

Some know “sigma” as the 18th letter of the Greek alphabet but it’s also teen slang for a cool dude. According to Know Your Meme, sigma is “referring to a supposed classification for men who are ...

Lean Six Sigma is an approach for efficiency in manufacturing and business that uses statistical modeling with the goal of delivering stable and predictable results. The original Six Sigma philosophy, ...

The meaning of Sigma in statistical analysis is a function of whether you use the upper or lower case of the letter. The uppercase use of sigma denotes a summation while the lowercase represents a ...