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Interpretation & Calculations
An Individual-X Moving Range Chart with process capability estimates from SPC IV Excel software.
Individual-X & Moving Range Charts are a set of control charts for variables data (data that is both quantitative and continuous in measurement, such as a measured dimension or time). The Individual-X chart monitors the process location over time, based on the current subgroup, containing a single observation. The Moving Range chart monitors the variation between consecutive subgroups over time.
Learn more about the SPC principles and tools for process improvement in Statistical Process Control Demystified (2011, McGraw-Hill) by Paul Keller, in his online SPC Concepts short course (only $39), or his online SPC certification course ($350).