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Focus on the results outlined in red. These are the basis for the numerator of all the metrics and are most likely to be calculated incorrectly by a spreadsheet. Then verify the Total %SV, Total %Tol and Total %Contribution to be safe. This is to verify that the denominators are correct.

For the same values i attached the output of spreadsheet and Minitab

Is this difference important? how much slide is "acceptable" between those two?

At the end which method we prefer as more objective?

Thank you again.