S
Sturmkind
AIAG and the U.S. OEM team have made another upgrade to the Measurement Systems Analysis manual. If one goes to the training sessions all AIAG manuals are available for purchase at $25 USD rather than the usual $75 USD.
Several changes and clarifications were made by the presenters:
Joe Bransky –GM; Mike Down –GM; Russ Hopkins –Ford,
Patrice White-Johnson –Ford; Fred Czubak –Chrysler, Gregory Gruska –Omnex; Steve Stahley –Cummins.
Four interesting points were made that may foster additional Cove discussion.
A) TS Auditor relations & procedures: Bransky said, “Only PPAP is a requirement. The other AIAG documents [APQP, MSA, PFMEA, SPC] are reference material and recommended practices but they are NOT required.”
a. He suggested that supplier procedures should make this distinction clear to avoid auditors using the whole manual as a requirement. A Lead Auditor from Lloyds agreed with this.
b. Mike Down mentioned that “auditors…get goofy with requirements for calibrated rulers, etc.”.
c. Shop floor systems should reference ANSI/NCSLZ540.3 as well.
B) Gage acceptability decision rule recommendation changed from 10/20/30 to 10, 10-30, >30.
C) Stahley said, “Some GRR is not value-added. For instance, profilometer measurements are better served with the uncertainty value rather than a GRR meant to largely satisfy an auditor.”. The Lloyds Lead Auditor agreed.
D) Gruska reminded everyone that, “Calibration is a re-centering of the measurement device. If using stability as a re-calibration decision tool then re-calibration is not needed until such a time as the measurement process drifts out-of-control.
The manual recommends cross-tabulation analysis as well as cleaning up the 10/20/30% of tolerance rule and shows why 0-30% has neglible effecgt on Ppk/Cpk metrics.
If anyone would like a list of summary specifics I would be happy to get that to you.
Several changes and clarifications were made by the presenters:
Joe Bransky –GM; Mike Down –GM; Russ Hopkins –Ford,
Patrice White-Johnson –Ford; Fred Czubak –Chrysler, Gregory Gruska –Omnex; Steve Stahley –Cummins.
Four interesting points were made that may foster additional Cove discussion.
A) TS Auditor relations & procedures: Bransky said, “Only PPAP is a requirement. The other AIAG documents [APQP, MSA, PFMEA, SPC] are reference material and recommended practices but they are NOT required.”
a. He suggested that supplier procedures should make this distinction clear to avoid auditors using the whole manual as a requirement. A Lead Auditor from Lloyds agreed with this.
b. Mike Down mentioned that “auditors…get goofy with requirements for calibrated rulers, etc.”.
c. Shop floor systems should reference ANSI/NCSLZ540.3 as well.
B) Gage acceptability decision rule recommendation changed from 10/20/30 to 10, 10-30, >30.
C) Stahley said, “Some GRR is not value-added. For instance, profilometer measurements are better served with the uncertainty value rather than a GRR meant to largely satisfy an auditor.”. The Lloyds Lead Auditor agreed.
D) Gruska reminded everyone that, “Calibration is a re-centering of the measurement device. If using stability as a re-calibration decision tool then re-calibration is not needed until such a time as the measurement process drifts out-of-control.
The manual recommends cross-tabulation analysis as well as cleaning up the 10/20/30% of tolerance rule and shows why 0-30% has neglible effecgt on Ppk/Cpk metrics.
If anyone would like a list of summary specifics I would be happy to get that to you.
