Re: Capability for CMM scanned profiles on a feature with a bilateral profile toleran
Here is the analysis I made based on your data. If you plot the difference from min to max, you are always going to have a positive value. Your lower limit is zero. I used the .08 as your tolerance, since it is the width of your profile zone, and 0 as your minimum (also identified as a boundary, since you can not go below it.) So you compare your zone usage to your total zone tolerance for capability - and if you do that, you get the attached results. Note that it is a non-normal distribution (used weibull as the distribution) since it is physically unilateral. Also, being non-normal and unilateral, Cpk and Ppk really don't apply - but are estimated for academic discussion.
This may not be my "final answer", but I provide it as a starting point for discussion.