The control chart limits are UCL = p + k p(1 − p) N CL = p UCL = c + k c CL = c LCL = c − k c (2) At each sampling epoch the number of nonconformities, x, is plotted and an out-of-control signal occurs whenever x plots outside the control limits. The c-chart...
99.7% of the data points should fall between the UCL and LCL. How do you calculate control limits? First calculate theCenter Line.The Center Line equals either the average or median of your data. Second calculatesigma. The formula for sigma varies depending on the type of data you have. ...