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MSA on a Counting System

#1
Greetings,

Trying to determine how to provide capability on a vision system that counts parts. Essentially, the system will photograph a stack of material, and then say how many pieces are in the stack. There is some variability in photo quality, but even so, the device is surprisingly accurate. I have two problems with a normal gauge r&r.

First, there is learning curve to the system this feeds, production does not want to train two operators so that we can have three for the r&r.

Second, the counts are all integers. The count may be 36, 27, 75, etc. The tolerance is zero.

Thanks in advance.

G
 
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#2
Unless you are operating under a specific requirement to have three operators (customer, regulatory, etc.), all of the gage R&R methods I am aware of can be done with two operators.
Having integer data is not a problem. Measurement in microns or nanometers may be a integer numbers but will not cause any problems. What is needed is for the gage to have adequate resolution and accuracy to tell good from bad and detect product variation.
However, having no tolerance is a problem for a variables data. If the gage is good, you will not have enough variability for the math to work. Not having considered this possibility before, I can’t help you any further.
 
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