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This thread is carried over and continued in the Current Elsmar Cove Forums 
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This thread is carried over and continued in the Current Elsmar Cove Forums
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The New Elsmar Cove Forums
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 The New Elsmar Cove Forums
 Miscellaneous Quality Topics
 Gage R&R Study
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This topic has been transferred to this forum: Measurement, Test and Calibration. |
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| Author | Topic: Gage R&R Study |
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David Drue Stauffer Forum Contributor Posts: 25 |
posted 09 February 2000 12:07 PM
   
I recently embarked upon a journey to write a course (ppt pres.) to teach fledgling companies how to perform Gage R&R Studies. In my endeavor to do so, I consulted the chat rooms of net. I pulled off a discussion that said, "A typical Gage R&R study involves three operators taking two measurements of ten "identical" parts. The unlabeled parts should be passed to the operator in random order so that there is no bias when performing the measurements. It is important that the operator is not aware of which part they are measuring so that no attempt can be made to try to replicate the previous measurement. After all of the measurements have been made, a series of calculations is performed to determine the % R&R. This value reflects how effective the measurement system is. A % R&R of less than 30% is considered to be acceptable by most industry standards." When I learned to do R&R studies, I believe in accordance with AIAG, I understood that ten parts that were selected from a manufacturing process were to "labeled" 1-10, and a spot marked on each part as to the location the measurement was to take place in order to isolate gage system error from part process error! ------------------ IP: Logged |
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Dawn Forum Contributor Posts: 245 |
posted 09 February 2000 10:24 PM
I believe you both are correct, as the parts are to be checked at random, but also must be identified (marked). Mark the parts with a black marker in one spot on the part; number the back of the parts; then mix them up for each operator while someone else writes them down. They are still being checked at random, but they are also being checked in the exact spot. This will give you true readings. IP: Logged |
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Laura M Forum Contributor Posts: 299 |
posted 10 February 2000 09:07 AM
I would add that the "measurement system" is being evaluated. If the parts can't be measured in the "exact same spot" when the gage is used in production, then you shouldn't specify where to measure for gage error. You may want to do that for diagnostic purposes...is it the gage or the process, but don't fool yourself. "Measurement System Analysis" isn't getting a gage to pass R&R. IP: Logged |
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Marc Smith Cheech Wizard Posts: 4119 |
posted 10 February 2000 11:43 AM
I've moved this to the Cal forum: https://elsmar.com/ubb/Forum4/HTML/000152.html IP: Logged |
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