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I & MR Charts are Control Charts designed for tracking single points of continuous data. They consist of two separate charts;  “I” stands for the “Individual” Chart which tracks the individual data points (or pre-summarized data) and “MR” stands for “Moving Range” Chart which tracks the absolute value of the distance between each pair of consecutive data points. These are considered the most flexible of the Control Charts and are often used to track business performance data.

A classic example of an I & MR Chart is to track daily total sales.

For a better understanding of the I & MR Chart (aka X & MR or Chart), check out our Black Belt Training & Certification Course!

Elisabeth Swan

Elisabeth is a Managing Partner at For over 25 years, she's helped leading organizations like Amazon, Charles Schwab and Starwood Hotels & Resorts build problem-solving muscles with Lean Six Sigma to achieve their goals.

Tracy O'Rourke

Tracy is a Managing Partner at She is also a Lean Six Sigma Green Belt Instructor at UC San Diego and teaches in San Diego State University’s Lean Enterprise Program. For almost 20 years, she has helped leading organizations like Washington State, Charles Schwab and GE build problem-solving muscles.