The document discusses different types of process behavior charts and decision trees used for analyzing data in quality control and process improvement. It defines continuous and discrete data and the different charts used depending on whether the data is measurement data, count data, or has a constant or varying subgroup size. Key charts mentioned include X-bar, R, XmR, np, p, c, and u charts. The document provides information on different process analysis tools and charts for quality professionals.

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Decision Tree www.roxtarinc.com www.leanacresonline.com
type of data
continuous or variable discrete or attribute
measurement data count data
answers the question: “how much?” answers the question: “how many?”
subgroup size (n) = 1 subgroup size (n) = 2‐9 subgroup size (n) >= 10 number of pieces or units number of occurrences
OR n = 2‐5 OR n >= 6 defectives defects
subgroup size (n) is constant subgroup size (n) is constant
subgroup size (n) varies subgroup size (n) varies
ImR OR XmR chart XbarR chart XbarS chart np chart p chart c chart u chart
individual values average and range average number of proportion number of number of
and range and defectives defective defects defects per unit
standard deviation
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The content of this material was developed and is copyright © 2011 by Jim Bowie.