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Hi all,
I taught to be a SPC expert but my vanity has been punished by the Gods.
When you find, in a capability sample, even one measurement outside the tolerance range, at least the Cpk must be < 1 ?!? Right???
It's incredible, I have found a sample where one item is smaller than the lower tolerance limit and Cpk 1,79 !!
It's the 3rd time I rewrite all the formulas and result is always the same.
Could someone take a look to the attached worksheet and explane me where I mistake?
Thanks.
I taught to be a SPC expert but my vanity has been punished by the Gods.
When you find, in a capability sample, even one measurement outside the tolerance range, at least the Cpk must be < 1 ?!? Right???
It's incredible, I have found a sample where one item is smaller than the lower tolerance limit and Cpk 1,79 !!
It's the 3rd time I rewrite all the formulas and result is always the same.
Could someone take a look to the attached worksheet and explane me where I mistake?
Thanks.
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