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Unilateral Tolerance Capability Calculation

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Posted 17th May 2016 at 09:07 AM by bobdoering
Updated 18th May 2016 at 08:06 AM by Marc

Capability indices and calculations are tough enough as it is, but a common approach of using Cpu or Cpl ("half Cpk's") is statistically incorrect. It assumes the data is normal - which is unlikely as you approach the physical limit (0 for form characteristics, such as roundness, concentricity, etc.). Check out the attached for further discussion.
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File Type: pdf unilateral tolerance capability calculation.pdf (152.7 KB, 360 views)
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