In These percents, enter one or more values to display additional confidence limit lines on your control chart.
Use proportion values (between 0 and 1) or percent values (between 1 and 100).
Place bounds on confidence limits
In Upper confidence limit bound, you can enter a bound for the upper confidence limit. The value must be greater than 0. If the calculated upper confidence limit is greater than the upper bound, Minitab draws a horizontal line labeled UB at the upper bound instead.