INITIAL POSTING: We need to perform GRR on operators scanning in defect codes into Manufacturing report system(drop down menu for defects). The subject is PCB with solder joint defects. Concern being, there are multiple characteristics for failure on 1 single board. eg. Solder bridge, insufficient, lifted etc. If I perform Attribute GRR on 10 boards, how do I translate these into Pass/ Fail category ?.How should I select the samples, standards and ascertain the Pass/fail.eg. Should I group all count of Solder bridges as one and then see whether each operator is able to detect the exact amount of solder bridges (PASS) else FAIL.?. Thanks in advance.
RESPONSE: In Minitab 14 you are not restricted to just pass or fail. You could assess different types of failures to see if inspectors are consistent with each other relative to their classification and with "the right response", as determined by a "panel of experts."
What is typically suggested is to select defects for the gage R&R study that are in the grey area relative to what category they should be placed into.
My contact information is below if you would like to discuss further.
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guest 3/2/2005
INITIAL POSTING: We need to perform GRR on operators scanning in defect codes into Manufacturing report system(drop down menu for defects). The subject is PCB with solder joint defects. Concern being, there are multiple characteristics for failure on 1 single board. eg. Solder bridge, insufficient, lifted etc. If I perform Attribute GRR on 10 boards, how do I translate these into Pass/ Fail category ?.How should I select the samples, standards and ascertain the Pass/fail.eg. Should I group all count of Solder bridges as one and then see whether each operator is able to detect the exact amount of solder bridges (PASS) else FAIL.?. Thanks in advance.
RESPONSE: In Minitab 14 you are not restricted to just pass or fail. You could assess different types of failures to see if inspectors are consistent with each other relative to their classification and with "the right response", as determined by a "panel of experts."
What is typically suggested is to select defects for the gage R&R study that are in the grey area relative to what category they should be placed into.
My contact information is below if you would like to discuss further.
Forrest Breyfogle
forrest@smartersolutions.com
www.smartersolutions.com
512-918-0280 x401