Lean Six Sigma is a method that relies on a collaborative team effort to improve performance by systematically removing waste and reducing variation. It combines lean manufacturing/lean enterprise and Six Sigma to eliminate the eight kinds of waste (muda): Lean Six Sigma is a method that relies on a collaborative team effort to improve performance by systematically removing waste and reducing variation. It combines lean manufacturing/lean enterprise and Six Sigma to eliminate the eight kinds of waste (muda): Lean six sigma not only reduces process defects and waste, but also provides a framework for overall organizational culture change. Waste is defined by Mr. Fujio Cho of Toyota as 'anything other than the minimum amount of equipment, materials, parts, space, and workers time, which are absolutely essential to add value to the product.'