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MSA Help or guidelines - Plastics - Setting up an MSA on a multi cavity fixture

S

SLEEPYMUM

#1
Hi Folks,

I hope someone can give me their expertise on setting up an MSA on a multi cavity fixture (mold produces 16 parts per cycle, fixture then has 16 stations - 1 for each cavity, parts are measured on a CMM).
I have been trying to research this and I cant seem to find a standard to reference or exact guidelines that I should follow.
Am I right in saying that there are basic guidelines (AIAG), but I need to be able to justify my MSA to auditor?


My questions are:
Can I run a station to station to equivalency study to rule out any issues with my fixture before I complete my MSA (R&R), if so what sample size should I be looking at.
Once this is complete can I then run a normal MSA (3 runs by 3 ops by 2 samples (2 samples of 16)?

Or should I be looking at this differently?, are there any guidelines I should be referencing?

The plastic components are consumer goods (not medical components), would this make a difference,

Thanks in advance for any help offered.....
 
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#3
If the CMM is DCC, you should be able to treat the multiple fixture stations as operators. Reproducibility would represent station to station variation. If the CMM is manual, you should use an expanded R&R study to include this variation in addition to the operator variation.
 
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