Statistical Details for Median Moving Range Charts

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

Publication date: 04/21/2023

Control limits for legacy Median Moving Range charts are computed as follows:

LCLMMR = max(0, MMR - kd3(n) Equation shown here )

UCLMMR = MMR + kd3(n) Equation shown here

where:

MMR is the median of the nonmissing moving ranges.

Equation shown here = MMR/0.954

d3(n) is the standard deviation of the range of n independent normally distributed variables with unit standard deviation.

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