' 81.2 0 10 20 30 40 50 60 70 80 90 (tons) 73.5 78.5 55.8 55.8 32.0 34.3 27.0 14.0 14.4 8.4 (FY) *1 Lean Six Sigma is a statistically based approach to business and product quality control that emphasizes the elimination of waste.