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A subcontractor uses a shadowgraph optical projector for measuring the width and length of 5 different products. Each part has different spec limits for width and length.
They have run a GR&R study using the 5 products with a measurement of width and length and called this the 10 parts. They have repeated the measurements 3 times with 3 operators.
Results are 0.76% GR&R and 183 ndc.
To me this is incorrect as there is variation within operators and when repeating measurements on each part. The results are too good and totally inaccurate.
Should I get them to repeat the GR&R 5 times, once for each product but just using the same spec limit (eg, width) for each?
They have run a GR&R study using the 5 products with a measurement of width and length and called this the 10 parts. They have repeated the measurements 3 times with 3 operators.
Results are 0.76% GR&R and 183 ndc.
To me this is incorrect as there is variation within operators and when repeating measurements on each part. The results are too good and totally inaccurate.
Should I get them to repeat the GR&R 5 times, once for each product but just using the same spec limit (eg, width) for each?
