Cpk/Ppk Week over Week trend chart

XN — Fri, 09 Jun 2023 00:50:19 GMT

Hi Everyone,

How can we have a plot for CPK/PPK Week over Week trend? I would like to compare the results across weeks to see if the results improves/worsens?

I sample script would be best helpful :)

Thanks!

Re: Cpk/Ppk Week over Week trend chart

txnelson — Thu, 02 Jun 2022 21:20:03 GMT

Assuming you have a data table that has a column that indicates the week and a column that contains the measurement values, with the Spec Limits populated as Column Properties for the measurement Column.

Go to

Analyze=>Quality and Process=>Process Capability

Fill in the Y, Process variable and place the column that has your week value into the "By" selection area

In the output report window, hold down the CNTL key, and then click on the red triangle for the Process Capability, and select

Summary Reports=>Within Sigma Summary Report

Holding down the CNTL key will signal JMP to create the report for all of the Weeks.

Right click on the summary report, and select

Create Combined Data Table

This will create a new data table that has all of the Cp/Cpk information for each week, which you can then use as your report

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Cpk/Ppk Week over Week trend chart

Re: Cpk/Ppk Week over Week trend chart