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Appendix A JMP Starter 411
The Measure Category
The Measure Category
The Measure category, shown in Figure A.9, accesses the commands on the Graph menu that are used
in statistical quality control.
Figure A.9 The JMP Starter Measure Category
AThe JMP Starter
Variability Chart Clicking the Variability Chart button on the Measure page, or choosing Graph
> Variability/Gauge Chart, performs a variability analysis, also called a Gauge R&R analysis. In a
variability analysis, a number of parts assumed to be identical are taken from a production line.
Each one is measured several times by a number of operators using different measuring
instruments. You want to know the magnitudes of the variation due to operators, parts, and
instruments.
The chapter “Variability Charts” of JMP Statistics and Graphics Guide documents the plots and
reports produced by the variability platform.
Attribute Chart Click the Attribute Chart Button, or select Graph > Variability/Gauge Chart
and choose Attribute from the drop-down menu, when your response values are binary or
categorical. For example, a circuit might be measured as pass/fail. Because different reports are
generated on the raters, raters each need to be in different columns. The chapter “Variability
Charts” of JMP Statistics and Graphics Guide documents the plots and reports produced by the
variability platform.
Capability Clicking the Capability button on the Measure page, or choosing Graph >
Capability, gives a platform option for capability analysis for quality control applications. A
capability study measures the deviation of a process from given specification limits. A window
prompts you for the lower spec limit, upper spec limit, and target. You can also enter a known
value for sigma, the process standard deviation.
See the chapter “Univariate Analysis” of JMP Statistics and Graphics Guide for examples of
capability analysis.
Pareto Plot Clicking the Pareto Plot button on the Measure page, or choosing Graph > Pareto
Plot, creates a bar chart (Pareto chart) that displays the severity (frequency) of problems in a
quality-related process or operation. A Pareto chart is a statistical quality improvement tool that
shows frequency, relative frequency, and cumulative frequency of problems. The defining