Dear all,

I am reseaching the methods for attribute MSA. But I don't have full MAS3e for attribute measurement system study. I only have page 126. 128.131.132.133.134.136.138

When I am reading the method of Singnal Detiction Approach. I am totally lost. If any one of you can explain this method for me,expecially in Page 134.

how come the %GRR=29%?

Many thanks in advance.

Jocy :thanx:

Sorry, I forgot to ask another question. How can we get the Ref Value ( in table of Page 134)?:thanx:

Sorry, I forgot to ask another question. How can we get the Ref Value ( in table of Page 134)?:thanx:

It's Saturday, and most folks here who might be able to help might not be here until Monday, or if they are here, might not have the manual at home with them. I'll give this a bump on Monday morning if you haven't gotten any responses by then.

Lovespring:

I was not able to find my MSA 3rd Edition but I will make some General comments (i.e. these are just conceptual comments, I am not dealing with the mechanics of the calculation). Please, be aware that since I don't have the book , I am not sure if I am targeting your question effectively.

Attribute Analysis is conceptually similar to both the GRR and Bias analysis.

In the attribute analysis (i.e. I am going to assume that your are dealing with pass/fail data), one provide both good known parts and bad known parts to the gage. The true known value of a parts are the reference values.

If the Gage look at the same part, multiple times, and reach the same measurement (i.e. either GOOD, GOOD, GOOD ... or BAD, BAD, BAD ...) this is conceptually similar to have good repeatability or good precision. Be aware that, the Gage could be in agreement with itself but in disagreement with the reference value (the true value of the part). If an operator is involve, it can be said that the operator is in agreement with himself.

If the Gage look at the same part, multiple times, and it is always agreement with the reference value of the part (i.e. either GOOD, GOOD, GOOD ... or BAD, BAD, BAD ...), this is conceptually similar to have a measurement system with zero bias, in other words, an accurate measurement system. If an operator is involve, it can be said that the operator is in agreement with the reference value.

I hope these general comments help.

cuadra

It's Saturday, and most folks here who might be able to help might not be here until Monday, or if they are here, might not have the manual at home with them. I'll give this a bump on Monday morning if you haven't gotten any responses by then.

Bump.

It looks like you're missing some key pages from the manual, and it's hard in the context of this forum to do a complete explanation. If you're trying to do a actual attributes study, it will help if you give us some particulars.
You really will need to get a copy of the manual if you hope to be able to understand it, though.

Dear all,

I am reseaching the methods for attribute MSA. But I don't have full MAS3e for attribute measurement system study. I only have page 126. 128.131.132.133.134.136.138

When I am reading the method of Singnal Detiction Approach. I am totally lost. If any one of you can explain this method for me,expecially in Page 134.

how come the %GRR=29%?

Many thanks in advance.

Jocy :thanx:

In the MSA manual they did an attribute MSA on 50 pieces from a process that was stable but not capable. ( variable SPC environment )
As containment action to get good parts to the customer they decided to have a GO/NOGO gauge to select the parts. Tht's the reason for the attribute MSA.
So the reference value is the actual measured value (variable) of the part.
The rest is explained on most of the pages you have in your possession.
I agree with the others that it would be better for your understanding the situation if you would buy the book.

Hope this helps,

If not, please come again,

Best regards,

Antoine

In the MSA manual they did an attribute MSA on 50 pieces from a process that was stable but not capable. ( variable SPC environment )
As containment action to get good parts to the customer they decided to have a GO/NOGO gauge to select the parts. Tht's the reason for the attribute MSA.
So the reference value is the actual measured value (variable) of the part.
The rest is explained on most of the pages you have in your possession.
I agree with the others that it would be better for your understanding the situation if you would buy the book.

Hope this helps,

If not, please come again,

Best regards,

Antoine


Thanks for all your help. I am a research student. there is no this books in our library. I will try to buy one.

Spring
:agree: