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Jay Arthur
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303-756-9144
KnowWare
International, Inc.
DBA LifeStar
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Denver, CO 80224
We work with companies
that want to fire up their profits using
Lean Six Sigma
Copyright © 2011
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Use an XmR chart to evaluate stability of processes
using variable data--time, cost, length, weight when your sample size
is one.
Here is an example of an XmR chart created
using the QI Macros for Excel.
Individuals Chart
Average
Range Chart
Range
The XmR chart can help you evaluate a process
when there is only one sample and they are farther apart: monthly postage
expense, time to write a computer program, and so on.
Calculate, plot, and evaluate the range chart first. If it is "out of
control," so is the process. If the range chart looks okay, then calculate,
plot, and evaluate the X chart.
XmR Chart Template
Watch a Video showing
how to create an XmR (Individuals Range Chart) in Excel
The XmR chart is just one of the tools included in the QI
Macros for Excel SPC Software for Excel.
Download
the FREE 30-day Evaluation copy of the QI Macros Excel SPC Software for Six Sigma
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QI Macros
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