For the latest version of JMP Help, visit JMP.com/help.


Quality and Process Methods > Control Chart Builder > Statistical Details for Control Chart Builder > Statistical Details for Levey-Jennings Charts
Publication date: 05/05/2023

Statistical Details for Levey-Jennings Charts

Levey-Jennings charts are available in Control Chart Builder and show a process mean with control limits based on a long-term sigma. The control limits are placed at K*s distance from the center line, where K = 3 by default.

The standard deviation, s, for the Levey-Jennings chart is calculated the same way standard deviation is in the Distribution platform.

Equation shown here

See Levey and Jennings (1950); Westgard (2002).

Want more information? Have questions? Get answers in the JMP User Community (community.jmp.com).