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A question on Measurement System Analysis - Stability to measure got

maghsoodi

Starting to get Involved
#1
Hi
A question about the stability analysis of systems analysis to measure got.
If the source pieces are exactly alike, we measured 125 times in about ucl, lcl do. In that case, what should I use graphing.
Example:
A reference piece, which measures 2.01 mm on each piece of reference I have measured 5 times I repeated this 25 times in total. Since the 125 is 2.01, which is exactly the minitab software ucl and I do not lcl. How this tool on the stability diagram:confused:
 
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Miner

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Admin
#2
Re: A question on Measurement system analysis

Do you mean that every individual measurement was 2.01? And because there was zero variation, the control limits were also 2.01?

If this is correct, I would say that you have practically proven that the measurement system is stable. The AIAG guideline uses a control chart to separate common cause variation from special cause variation to determine stability. In your case the measurement system cannot detect either type of variation. Provided that you have an acceptable R&R result, this is irrelevant in a stability study. Unfortunately, AIAG did not anticipate this scenario and did not provide guidance.
 
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