3: Timebo... 2 / 2 78% Lower Linst Time Outustion UCL - upper controllimit +3 sigma + 2 sigma + 1 Sigma CU center line (avg) 1683% 955% $9.7% 1 sigma -2 sigma Standard Deviation or Sigma 1 LCL - lower controllimit - 3 sigma How do you calculate control limits? 1. First calculate the Center Line. The Center Line equals either the average or median of your data, 2. Second calculate sigma. The formula for sigma varies depending on the type of data you have. 3. Third, calculate the sigma lines. These are simply : 1 sigma, 2 sigma and 3 sigma from the center line + 3 sigma = Upper Control Limit (UCL) - 3 sigma = Lower Control Limit (LCL) 3: Timebo... 2 / 2 78% Lower Linst Time Outustion UCL - upper controllimit +3 sigma + 2 sigma + 1 Sigma CU center line (avg) 1683% 955% $9.7% 1 sigma -2 sigma Standard Deviation or Sigma 1 LCL - lower controllimit - 3 sigma How do you calculate control limits? 1. First calculate the Center Line. The Center Line equals either the average or median of your data, 2. Second calculate sigma. The formula for sigma varies depending on the type of data you have. 3. Third, calculate the sigma lines. These are simply : 1 sigma, 2 sigma and 3 sigma from the center line + 3 sigma = Upper Control Limit (UCL) - 3 sigma = Lower Control Limit (LCL)