Six Sigma

Six Sigma was originally developed as a set of practices designed to improve manufacturing processes and eliminate defects, but its application was subsequently extended to other types of business processes as well.[2] In Six Sigma, a defect is defined as anything that could lead to customer dissatisfaction.[1]

The particulars of the methodology were first formulated by Bill Smith at Motorola in 1986.[3] Six Sigma was heavily inspired by six preceding decades of quality improvement methodologies such as quality control, TQM, and Zero Defects, based on the work of pioneers such as Shewhart, Deming, Juran, Ishikawa, Taguchi and others.

Like its predecessors, Six Sigma asserts that –

Continuous efforts to achieve stable and predictable process results (i.e. reduce process variation) are of vital importance to business success.

Manufacturing and business processes have characteristics that can be measured, analyzed, improved and controlled.

Achieving sustained quality improvement requires commitment from the entire organization, particularly from top-level management.

Features that set Six Sigma apart from previous quality improvement initiatives include –

A clear focus on achieving measurable and quantifiable financial returns from any Six Sigma project.[1]

An increased emphasis on strong and passionate management leadership and support.[1]

A special infrastructure of "Champions", "Master Black Belts", "Black Belts" etc. to lead and implement the Six Sigma approach.[1]

A clear commitment to making decisions on the