R
ricardo.qre
After using the data from our process we got:
cpk=2.42
ppk=0.76
we used a I-MR chart to get the data.
I understand ppk should be used as long term and cpk short term, since the differences on how the sigma is calculated, but
What conclusion can I reach about my process?
I mean, by having ppk vs cpk big differences is there any typical conclusion we can obtaine from this?
and what about if cpk = ppk (or very close)
waht does that mean ?
cpk=2.42
ppk=0.76
we used a I-MR chart to get the data.
I understand ppk should be used as long term and cpk short term, since the differences on how the sigma is calculated, but
What conclusion can I reach about my process?
I mean, by having ppk vs cpk big differences is there any typical conclusion we can obtaine from this?
and what about if cpk = ppk (or very close)
waht does that mean ?