This may have been asked but a search netted me nothing. Is there a check box or something that I can modify that will correctly calculate the Cp and Cpk on a true position call out or other one sided call out. I hate that a hole with 3.0mm true position tolerance and an average measured TP of .3 gives me a bad Cpk.
If so try changing the distribution to half-normal to get a slightly better Cpk.
I running version 3.24, go to VIEW menu, VARIABLES, I use the FORM EDITOR.
Select your part from the list, then open the VARIABLE pull down and scroll to the TP variable(s) you need to change.
In the DISTRIBUTION pull down choose HALF NORMAL.
Make sure to hit Save All before closing the dialog box.
If HALF NORMAL doesn't give you a satisfactory Cpk try some of the other DISTRIBUTION options.
If so try changing the distribution to half-normal to get a slightly better Cpk.
I running version 3.24, go to VIEW menu, VARIABLES, I use the FORM EDITOR.
Select your part from the list, then open the VARIABLE pull down and scroll to the TP variable(s) you need to change.
In the DISTRIBUTION pull down choose HALF NORMAL.
Make sure to hit Save All before closing the dialog box.
If HALF NORMAL doesn't give you a satisfactory Cpk try some of the other DISTRIBUTION options.
