Quality and Process Methods • Shewhart Control Charts
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Shewhart Control Charts
Create Variable and Attribute Control Charts
A control chart is a graphical and analytic tool for monitoring process variation. The natural variation in a process can be quantified using a set of control limits. Control limits help distinguish common-cause variation from special-cause variation. Typically, action is taken to eliminate special-cause variation and bring the process back in control. It is also important to quantify the common-cause variation in a process, as this determines process capability.
The Control Chart platform in JMP provides a variety of control charts, as well as run charts. To support process improvement initiatives, most of the control chart options display separate control charts for different phases of a project on the same chart.
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Run Chart
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X-, R-, and S-charts
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Individual and Moving Range Charts
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p-, np-, c-, and u-charts
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UWMA and EWMA Charts
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CUSUM Charts
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Presummarize, Levey-Jennings, and Multivariate Control Charts
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Phase Control Charts for X-, R-, S-, IR-, p-, np-, c-, u-, Presummarize, and Levey-Jennings Charts.
Figure 3.1 Control Chart Example
Contents 
Overview of the Control Chart Platform
Example of the Control Chart Platform
Shewhart Control Chart Types
Control Charts for Variables
Control Charts for Attributes
Launch the Control Chart Platform
Process Information
Chart Type Information
Limits Specifications
Specified Statistics
The Control Chart Report
Control Chart Platform Options
Control Chart Window Options
Individual Control Chart Options
Saving and Retrieving Limits
Excluded, Hidden, and Deleted Samples
Additional Examples of the Control Chart Platform
Run Chart Example
X Bar- and R-charts Example
X-Bar- and S-charts with Varying Subgroup Sizes Example
Individual Measurement and Moving Range Charts Example
p-chart Example
np-chart Example
c-chart Example
u-chart Example
UWMA Chart Example
EWMA Chart Example
Presummarize Chart Example
Phase Example
Statistical Details for the Control Chart Platform
Control Limits for Median Moving Range Charts
Control Limits for UWMA Charts
Control Limits for EWMA Charts

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Help created on 7/12/2018