Process Capability for Attribute Data.
February 5, 2004 at 7:49 pm #34470
I am trying to measure the process capability for a data collection process. My Six Sigma measurement is % Defects (Defect defined as erroneous data) recorded monthly. I am using an XmR chart to record the measurement and I beleive the process average would give me the process capability.
Am I on the right track. I would appreciate if someone can throw light on this?
Your help much appreciated.
0February 5, 2004 at 8:06 pm #95120
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You will need to figure out how many samples you have checked and how many opportunities there are for a defect. Multiply the opportunities by the # samples to get your total opps, then devide the # of defects by total opps to get your DPO. Multiply this # by 1,000,000 to get your DPMO and then convert this to a sigma value.
Defs=99 Units=7528 Opps=2 Total Opps=15056
6575dpmo= 3.98 sigma(approx)0
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