I'm learning somewhat on how to measure a profile of a surface. I need help on how to do this correctly and to do a correct cpk on the profile. Here is example of what I'm dealing with. On the design print I'm dealing with a ignition coil. On this print it calls out for this profile. Here is an example.Profile symbol/2.0/datum A. Sorry it wouldn't paste my picture to show better example. This is really new to me. I doing this on CMM / With a MM3 program. If someone could help step by step I would really appreciate it. Also, if I would a cpk study on this what would be the tolerance zone for this +/-.