Options - Parameters
main topics     how to     see also      

...  > control chart Options  > Parameters

Charts  U, Laney U'

You can enter historical data for estimating u. For example, if you have a known process parameter or an estimate obtained from past data, you can enter the value(s). If you do not specify a value for the mean, Minitab estimates it from the data. You can omit or include certain subgroups when estimating parameters using Estimate.

Dialog box item

Mean: Enter the historical means as constants.