Six Sigma literally means "a failure rate of 3.4 parts per million or 99.9997%."
The Six Sigma process improvement methodology was created by Mikel Harry and Richard Schroeder at Motorola in the early 1980's. It is a management philosophy that strives to reduce out-of-specification product or service delivery to the Six Sigma (i.e., less than one-in-a-million) level. The approach employs a rigorous project methodology, which utilizes statistical analysis toentify root causes.
While it can be simply expressed through the steps "Define - Measure - Analyze - Improve - Control, " it can be complicated to follow.
As applied, it is a rigorous and disciplined methodology that utilizes data and statistical analysis to measure and improve a company s operational performance, practices and systems. applied to manufacturing and service-related processes, it can be applied to Information Technology. The term has also become a phrase that evokes theeal of near perfection.