Lean Six Sigma is a synergised managerial concept of Lean and Six Sigma that results in the elimination of the seven kinds of wastes/muda (classified as Defects, Overproduction, Transportation, Waiting, Inventory, Motion and overProcessing) and provision of goods and service at a rate of 3.4 defects per million opportunities (DPMO) .
The Lean Six Sigma concepts were first published in the book titled "Lean Six Sigma: Combining Six Sigma with Lean Speed" authored by Michael George in the year 2002. Lean Six Sigma utilises the DMAIC phases similar to that of Six Sigma. The Lean Six Sigma projects comprise the Lean's waste elimination projects and the Six Sigma projects based on the critical to quality characteristics. The DMAIC toolkit of Lean Six Sigma comprises all the Lean and Six Sigma tools. The training for Lean Six Sigma is provided through the belt based training system similar to that of Six Sigma. The belt personnel are designated as Green Belts, Black Belts and Master Black Belts.