Miss rate & False Alarm Rate - What are they and how are they calculated?

P

paulo

#1
Hello!!

Somebody can help me to calculate the described value of Miss Rate and False alarm rate in the manual of the MSA page 132.

I am trying to do a plan in excel to make all calculations discrible in the MSA manual, and for this I am using all the data of the manual, but these two values (Miss Rate and False alarm rate) I can't understand as they had been calculated.

Sorry for some error of English. :bonk:

Greetings of Brazil.

Paulo :agree1:
 
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Q

qualitytrec

#2
Have you gone onto the aiag site to make sure that you are looking at the right information. i know that Page 132 was changed because information in the chart was wrong.
try this link ***DEAD LINK REMOVED***

It looks like a hypothetical situation of bad practice when I read the page. But it is interesting that they do not tell how to calculate Miss rate and false alarm rate. But it is probably because you have to know if you are dealing with good or bad product to start with. Look on page 17 & 18.

Mark
 
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Govind

Super Moderator
Staff member
Super Moderator
#3
paulo said:
Hello!!
Somebody can help me to calculate the described value of Miss Rate and False alarm rate in the manual of the MSA page 132.
I am trying to do a plan in excel to make all calculations discrible in the MSA manual, and for this I am using all the data of the manual, but these two values (Miss Rate and False alarm rate) I can't understand as they had been calculated.
Sorry for some error of English. :bonk:
Greetings of Brazil.
Paulo :agree1:
Paulo,
Welcome to Cove.
I did very detailed experiments back in 2000-2002 in the same subject with respect to Visual inspection of optical surfaces. There were lot of inconsistency in the measurement results. So I introduced this method.

Earliest origin of this method (to my knowledge) is Juran Handbook Page: 23.51-23.53 (5th edition)
Under the title Measure of Inspector and Test accuracy.

You can see also see similar approach from:
Attribute Gage R&R.pdf

The next most authentic reference known to me is the Minitab Statistical software documentation.
The Software function is under STAT-Quality Tools-Attribute Agreement Analysis
Some theory on this method is available in: ***DEAD LINK REMOVED***

I have used all 3 approaches during my experimentation.

I dont have MSA 3rd Edition with me. Unfortunately, Iam not able to comment on that aspect.

Regards,
Govind.
 
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