Brian & Jim,
Thanks for your help.
First, I should explain that this is not our process, it is one of our suppliers. I needed a gage R&R for PPAP requirement and our supplier called to ask what total tolerance to use on the Gage R&R form. This supplier did a small (30 pieces) capability study.
Brian, should I use 6 sigma of this small study? X bar chart from 30 piece study yielded a mean =.00044, sigma = .0000189 and range=.000031.
Jim, I'm not sure what you mean by;
"determining what the "fitup" dimension after plating is". The part in question is cylindrical and parts are added to both the inside and outside. I ended up using the spec itself (.00035) and ended up with a Gage R&R of 9.15%. I think that I'll use this and argue the merits at a later date!
And Jim, to answer your question: "What's a Sabre?" I'm refering to the Buffalo Sabres a National Hockey League team on the cusp of missing the playoffs!
Again all, thanks for your help!
Peace......out!