SP-Quality
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How do others do statistical studies on a weight counting scale? We have our scales calibrated annually and confirm counts throughout the packaging process. Is a statistical study required? Any insight is appreciated.
Remove weigh counting from your control plan. I see no need to have it on there. At my company, weigh counting is covered by the process work instructions and is not on the control plan and I have never had this questioned.
That's interesting. I have a customer where we have experienced quite a few counting errors, mainly because they "kit" the parts on their end so they always find even the smallest counting error. We have found the biggest reasons for counting errors are: 1) operators who don't properly set the scales; 2) using too small of a sample size for the part (light parts need larger sample); and 3) using too large a scale for the box count/part size. A traditional "gage R&R" study would not resolve those issues, though I think if we'd have documented the studies we've done on counting it would certainly qualify as an MSA, just not in the traditional sense. How did you handle the MSA with "rhymes with Rhonda"?I've been raked over the coals over parts counting by an Automotive OEM customer that rhymes with "Rhonda". So this may be relevant. It was a big deal for our customer, so it made it to the control plans.