https://community.jmp.com/t5/Discussions/How-do-I-get-Formula-of-calculate-quantile-spec-limits-in/m-p/848105#M102323 <P>Hi&nbsp;<a href="https://community.jmp.com/t5/user/viewprofilepage/user-id/57730">@Sandra233</a>&nbsp;</P> <P>&nbsp;</P> <P>Check below link if it can answer your question.</P> <P><A href="https://origin-www.jmp.com/support/help/en/18.1/index.shtml#page/jmp/statistical-details-for-capability-indices-for-nonnormal-distributions.shtml" target="_self">Statistical Details for Capability Indices for Nonnormal Distributions</A></P> <P><A href="https://community.jmp.com/t5/Discussions/Find-new-spec-limits-by-adjusting-the-CpK-value/td-p/571145" target="_blank">Find new spec limits by adjusting the CpK value - JMP User Community</A></P> <P>&nbsp;</P> <P>The 6Sigma is equivalent to 1.413</P> <P>&nbsp;</P> Mon, 17 Mar 2025 07:16:29 GMT WebDesignesCrow 2025-03-17T07:16:29Z https://community.jmp.com/t5/Discussions/How-do-I-get-Formula-of-calculate-quantile-spec-limits-in/m-p/847224#M102187 <P>I do distributions analysis in jmp pro.18 with fit smooth curve function, then get USL/LSL value by using 6-sigma to calculate quantile spec limits under process capability function. I'd like to know what formula is used to calculate USL/LSL. I'm trying to run the same formula in the excel version.&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="wilsonliao233_0-1741672076915.png" style="width: 400px;"><img src="https://community.jmp.com/t5/image/serverpage/image-id/73732i007D378BA011A32E/image-size/medium?v=v2&amp;px=400" role="button" title="wilsonliao233_0-1741672076915.png" alt="wilsonliao233_0-1741672076915.png" /></span></P><P>&nbsp;</P> Tue, 11 Mar 2025 05:59:42 GMT https://community.jmp.com/t5/Discussions/How-do-I-get-Formula-of-calculate-quantile-spec-limits-in/m-p/847224#M102187 Sandra233 2025-03-11T05:59:42Z https://community.jmp.com/t5/Discussions/How-do-I-get-Formula-of-calculate-quantile-spec-limits-in/m-p/848105#M102323 <P>Hi&nbsp;<a href="https://community.jmp.com/t5/user/viewprofilepage/user-id/57730">@Sandra233</a>&nbsp;</P> <P>&nbsp;</P> <P>Check below link if it can answer your question.</P> <P><A href="https://origin-www.jmp.com/support/help/en/18.1/index.shtml#page/jmp/statistical-details-for-capability-indices-for-nonnormal-distributions.shtml" target="_self">Statistical Details for Capability Indices for Nonnormal Distributions</A></P> <P><A href="https://community.jmp.com/t5/Discussions/Find-new-spec-limits-by-adjusting-the-CpK-value/td-p/571145" target="_blank">Find new spec limits by adjusting the CpK value - JMP User Community</A></P> <P>&nbsp;</P> <P>The 6Sigma is equivalent to 1.413</P> <P>&nbsp;</P> Mon, 17 Mar 2025 07:16:29 GMT https://community.jmp.com/t5/Discussions/How-do-I-get-Formula-of-calculate-quantile-spec-limits-in/m-p/848105#M102323 WebDesignesCrow 2025-03-17T07:16:29Z