How do I calculate the percentage of errors, when I know min, max, mean, cp and CPK

#1
HI

I think I put it all in the subject line.

I have a problem for school. I asked a teacher a problem he couldn't answer, so now I have to find the solution.

I know the following:
CP
CPK
Minimum value
Maximum value
and the mean value.

I need to calculate how many % falls outside min min-max borders!

Can anyone help?
 
Elsmar Forum Sponsor
D

Don Winton

#2
What you need is located <a href="http://Elsmar.com/pdf_files/CPK.pdf" target=blank>here</a>. Specifically, pages 8 through 11. Standard PDF format, so you will need Acrobat Viewer to read it.

Hope this helps.

Regards,
dWizard
 
#3
For a normal distributation:

Zusl= USL - Xdbar/sigma.

Look up Zusl on a "standard normal distributation" table.

Do the same the Zlsl
 
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