CPK / PPK
Dear Community,I have a "simple" question... but it put me in trouble in this moment.For my analsys I use JMP 14. A lot of times I need to calculate CPK and PPK.When I ask to JMP to calculare the CPK, the software generate this analsys and give me the number.I checked it and in this CPK number the sigma used for the calculation is "sum of square method" and not R/D2.So... this rappresent the PPK a...