H
TS clause 7.6.1 specifies that statistical studies (MSA) shall be conducted on measurement systems referenced in the control plan. PPAP manual in the section for Process capability specifies that capability studies shall be conducted on SC's and then goes on to say that MSA must be performed. Some folks are interpreting this as if there is a gage associated with an SC on the control plan then an MSA is required, but all other gages on the control pan, if not associated with an SC, do not have to have an MSA. (the issue of family of gages etc is irrelevant to this question). So, is an MSA required for all systems or only for those associated with an SC?