Gage R&R nested on Minitab

Jim Wynne

Staff member
Admin
#11
ptitevy said:
Hello... Indeed may if I were a native English speaker it would have been easier to understand each other... Anyway, I think we are on the right track
You're doing fine. You don't want to even think about what might happen if I had to do this in your language. The result might be an international incident:lmao: .
OK--the small strips are cut based on the belief that the amount of PE on the entire length can be accurately estimated by measuring the amount on a small portion of it? In other words, if the whole strip contains x grams of PE, and we cut a strip equivalent to 1/10 of the whole, then the assumption is that the amount of PE on the whole strip is equal to 10 times what's found on the cut sample? If this is the case, are you sure that the amount of PE hanging off is linear (uniform) across the big strip, or is that what you're trying to determine?
 
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ptitevy

#12
JSW05 said:
You're doing fine. You don't want to even think about what might happen if I had to do this in your language. The result might be an international incident:lmao: .
Probably... Did I tell you that the factory is in Hungary? Hungarian is a terrible language... I am sure you have no idea how it sounds...

JSW05 said:
OK--the small strips are cut based on the belief that the amount of PE on the entire length can be accurately estimated by measuring the amount on a small portion of it? In other words, if the whole strip contains x grams of PE, and we cut a strip equivalent to 1/10 of the whole, then the assumption is that the amount of PE on the whole strip is equal to 10 times what's found on the cut sample? If this is the case, are you sure that the amount of PE hanging off is linear (uniform) across the big strip, or is that what you're trying to determine?
The aim of this measurement is to know the {average} grammage of the waste PE. Of course we would like to know if the PE is constent, but this is a sub issue, and it SHOULD be constent.

We are trying to determine the consistency of the cutting method.

Please fell free to ask more questions if I am still too vague...
 

Jim Wynne

Staff member
Admin
#13
ptitevy said:
The aim of this measurement is to know the {average} grammage of the waste PE. Of course we would like to know if the PE is constent, but this is a sub issue, and it SHOULD be constent
We are trying to determine the consistency of the cutting method.
But you haven't answered my questions, so I'm not sure how I can help:

  1. If you want to know the average, why don't you just measure (weigh) the big, original strip. Why do you cut it into pieces?
  2. How do you isolate the amount of PE on the samples, if the samples also include paper?
  3. Why not just take 10 or twelve samples, have 3 operators weigh them and see how close the results are, without doing a lot of potentially unnecessary calculations?
 
P

ptitevy

#14
JSW05 said:
But you haven't answered my questions, so I'm not sure how I can help:

  1. If you want to know the average, why don't you just measure (weigh) the big, original strip. Why do you cut it into pieces?
  2. How do you isolate the amount of PE on the samples, if the samples also include paper?
  3. Why not just take 10 or twelve samples, have 3 operators weigh them and see how close the results are, without doing a lot of potentially unnecessary calculations?
I don't know how I express my self but it seems that nobody understand me :(

Answers:
1/ to test reproducability and repeatability
2/ {paper + PE} sample is given to operator. Then the issue is about how acurate the operator will get ride off the paper !! So {only the PE} is weighted
3/ this is what was done. we don't how the operator can be constent while cutting the samples (when the paper is removed)

For me it seems that I can not be more clear...
Anyway I am still ready to answer to questions...

But WHO will tell me what to do and how to enter data in Minitab ?
 
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