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Leonard
Leonard
Level III

Cauchy distribution. Where is Process capability button?

Created: Aug 12, 2020 07:45 AM  |  Last Modified: Jun 10, 2023 4:17 PM (8554 views)

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Why where is no Process Capability button? Or you can't do it with Cauchy's distribution data.

 

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10 REPLIES 10
shampton82
shampton82
Level VII

Re: Cauchy distribution. Where is Process capability button?

Aug 12, 2020 11:32 PM (1335 views)  |  Posted in reply to message from Kevin_Anderson 08-12-2020

Is this count data?  If so a couple of ideas: You could turn it into pass/fail based upon your defect limit then convert your defect rate to a Ppk from a sigma-DPMO-Ppk table.  You could also fit it as Poisson and use the distribution profiler to determine what your DPMO rate was (by setting the x axis to your spec limit and using the returned Y value) and convert that into a Ppk. The other option would be to turn your zero's into 0.0001's and then you'll have some additional distributions you can fit.

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