JSW05 said:
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When you present a hypothetical situation, "assumptions" are information assumed to be true that's needed to understand the situation and properly evaluate the question. In this case, you should have just given us the question/situation as it was presented to you.
OK here are the exact Questions that I have with me which I posted in the first post only. But I will repeat it again without my conclusion or assumptions..
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Q1. Referring to the above GRR Study; What would one should change to Improve the Measurement System..?
Q2. If GRR Study is to be repeated; What would one do differently..?
Assumption/Information - All operators measured all the parts (5 parts in this case) Individually but in a group with same ruler (Each part measured 3 times - 3 Trials).
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I assumed that since all the operators measured all the parts but since every reading was eaxctly the same as each other (Taking ruler accuracy into account, the way the part was measured); all these things influenced each others measurement observation including the measured values..!!
So the
Answer to the Q2 would be:
* Use a more accurate or resolution sensitive instrument Eg. Vernier Caliper, which has a resolution 10% of the Tol.(0.250) i.e., 0.0250 would give a better Repeatability(Equipment Variation) results.... I'm confused here or am I right..?
* The (5)parts should have been measured by all the (3)operators individually rather than in group to avoid the influence factor and get better Reproducability(Appraiser Variation).
Are the above two conclusions correct? Anything more could be added to it?
Answer for the Q1. As you Quoted earlier -
* It appears that the device lacks the requisite sensitivity; the tolerance spread is .250 and the resolution of the device is (apparently) .0625. In order to be kosher, the device should be sensitive to 1/10 of the tolerance spread (.025 in this case). If you were to use calipers instead of a scale you would undoubtedly see more of the variation you're looking for.
Anything else, that can be added for Q1 answer..?
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Sorry about all these question but I am not able to draw any more conclusions on -
How the Measurement system can be improved..
What could be done differently if the Gage R&R is repeated..
