L

#### lisaptran

Thanks god i found this site

Here are my questions: are there any stats genius out there tell me how to calculate capability indices for non-normal distribution? such as best fit Jonhson for for Pp and Ppk . what is a ordinate .99865 and ordinater .00135 ( where do i find this value what book etc..) can it be manual calculated?

it would be more helpful beside johnson dist. what are the other method to calculate process capabily for non-normal (manually)

One more thing if the process is not follow the normal distribution Cp and Cpk can't be use right? is it the same with if the control chart is running like a yo-yo Cp and Cpk indices can't be use right?

thank you for your help

Here are my questions: are there any stats genius out there tell me how to calculate capability indices for non-normal distribution? such as best fit Jonhson for for Pp and Ppk . what is a ordinate .99865 and ordinater .00135 ( where do i find this value what book etc..) can it be manual calculated?

it would be more helpful beside johnson dist. what are the other method to calculate process capabily for non-normal (manually)

One more thing if the process is not follow the normal distribution Cp and Cpk can't be use right? is it the same with if the control chart is running like a yo-yo Cp and Cpk indices can't be use right?

thank you for your help

Last edited by a moderator: