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Hello,
This is my first post on this forum, but I have a question that has (I hope) a quick answer. I recently did a capability analysis in Minitab, and the output is attached below. I am receiving a note that says "Specification limit or target for Centering outside of transformation function." I know what the error is telling me, but my question is how is Pp calculated if the specification limits are not able to be calculated? I would like to know an exact formula, or some reference document that explains what to do if a Johnson transformation is needed, but the specification limits cannot be transformed.
Thanks for the input.
This is my first post on this forum, but I have a question that has (I hope) a quick answer. I recently did a capability analysis in Minitab, and the output is attached below. I am receiving a note that says "Specification limit or target for Centering outside of transformation function." I know what the error is telling me, but my question is how is Pp calculated if the specification limits are not able to be calculated? I would like to know an exact formula, or some reference document that explains what to do if a Johnson transformation is needed, but the specification limits cannot be transformed.
Thanks for the input.