In Reply to Parent Post by cbeatty
The Analytical Method for attribute msa on page 135 of MSA manual 3rd edition is the preferred method per AIAG. Other than the MSA manual, I have found very little information on this method. Are there many other people out there using this? Does anyone have a spreadsheet for the analytical method that they would be willing to share?
For years we have been using the 2 person x 20 part x2 times short version. This may have had some shortcomings but is was quick and straightforward. It was not unreasonable to expect personnel at various plants to be able to implement it. With the analytical method, I fear the complexity will overwhelm many sites that we have.
As long as your customer approves the way you work you are safe.
But, if you deliver to e.g. Ford you have the following guidelines from their customer specific requirements :
Variable gauge studies should utilize 10 parts, 3 operators and 3 trials. Attribute gauge studies should utilize 50 parts, 3 operators, 3 trials. Effective attribute gauge study samples include parts within specification and parts outside specification for each criterion being measured and within the expected range of manufacturing variability.