minitab给出的解释：
Lower spec: Enter the lower specification limit. Check Boundary to define the number as a "hard" limit. See Upper spec below for an explanation.
Upper spec: Enter the upper specification limit. Check Boundary to define the number as a "hard" limit, meaning that it is impossible for a measurement to fall outside the limit.
Note
You must enter a lower specification limit and/or an upper specification limit.
When you define upper and lower specification limits as boundaries, Minitab sets the expected percentage of values that are out of specifications to * for a boundary.
发表于 2021-4-9 11:22:03
发表于 2021-4-9 15:27:40
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