Multivariate EWMA - Options - Limits
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Stat > Control Charts > Multivariate charts > Multivariate EWMA  > MEWMA Options > Limits

Specifies the confidence limit positions.

Dialog box items

Place bounds on confidence limits

Upper confidence limit bound: Check to set the upper confidence limit bound, then type the upper limit (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.