Re: MSA for special characteristics
I think what's important to keep in mind here is that the MSA is for the measurement tools in the system, whose purpose are to evaluate the special characteristics for acceptability. Maybe the same CMM is used to measure all five characteristics. If so, I would expect the analysis to be performed on that tool in the measurement range of those five characteristics (possibly somewhat lower than the minimum and higher than the greatest one). Does this make sense? To summarize, MSA is done on the tool, not the characteristics.
"If you only have a hammer, you tend to see every problem as a nail." Abraham Maslow