https://community.jmp.com/t5/Discussions/Help-with-PPK-on-one-sided-data-which-includes-zeros/m-p/940559#M109402 <P>I’m trying to calculate an appropriate PPK for data with the following criteria:</P> <UL> <LI>Data lies between 0 and +Inifinity</LI> <LI>A significant portion of the data is exactly 0, and this represents an actual true 0</LI> <LI>Has an Upper Spec limit only</LI> <LI>Heavily Skewed</LI> </UL> <P>The distribution should be an appropriate distribution for the data.</P> <P>What’s the best way to get JMP to do this?</P> Wed, 08 Apr 2026 15:59:43 GMT david707 2026-04-08T15:59:43Z https://community.jmp.com/t5/Discussions/Help-with-PPK-on-one-sided-data-which-includes-zeros/m-p/940559#M109402 <P>I’m trying to calculate an appropriate PPK for data with the following criteria:</P> <UL> <LI>Data lies between 0 and +Inifinity</LI> <LI>A significant portion of the data is exactly 0, and this represents an actual true 0</LI> <LI>Has an Upper Spec limit only</LI> <LI>Heavily Skewed</LI> </UL> <P>The distribution should be an appropriate distribution for the data.</P> <P>What’s the best way to get JMP to do this?</P> Wed, 08 Apr 2026 15:59:43 GMT https://community.jmp.com/t5/Discussions/Help-with-PPK-on-one-sided-data-which-includes-zeros/m-p/940559#M109402 david707 2026-04-08T15:59:43Z