Launch Windows for Specific Control Charts
The options that appear in the launch windows for specific control charts vary depending on whether you are launching variable control charts or attribute control charts. You can access these launch windows through the Analyze > Quality and Process > Control Chart menu. These launch windows enable you to specify variables for a control chart in Control Chart Builder.
Launch Windows for Variable Control Charts
This section contains information about the launch windows for IMR, XBar, Run, Levey Jennings, IMR on Means, and Three Way Control Charts.
Figure 3.5 Launch Window for Variable Control Charts
For more information about the options in the Select Columns red triangle menu, see “Column Filter Menu” in Using JMP.
Y
Assigns the process variables.
Subgroup
(Not available for Run charts.) Assigns the subgroup variables. When a subgroup variable is assigned, each point on the control chart corresponds to a summary statistic for all of the points in the subgroup.
Time
(Not available for XBar, IMR on Means, or Three Way Control Charts.) Assigns a sample label variable to uniquely label individual measurements. The labels are not aggregated or sorted and appear on the horizontal axis in the same order they appear in the data table.
Note: If a subgroup size greater than one is specified by a Subgroup variable, a constant subgroup size, or the Set Subgroup Size command in a script, the Label variable is ignored.
Phase
(Not available for Run charts.) Assigns the phase variable. When a Phase variable is assigned, separate control limits are computed for each phase.
Note: If there is a spec limits column property, by default, the same specification limits are used for each phase. However, no capability analysis is shown.
By
Identifies a variable to produce a separate analysis for each value that appears in the column.
K Sigma
(Not available for Run charts.) Specifies the K value to be multiplied by sigma to form the control limits for the average. By default, K Sigma is set to 3.
Range Span
(Available only for IMR charts.) Specifies the number of consecutive measurements from which the moving ranges are computed. By default, Range Span is set to 2.
Sort by Subgroup
(Available only for IMR charts.) Sorts all Y variables by the Subgroup variable.
Show Center Line
(Available only for Run charts.) Shows the center line on the chart.
Constant Subgroup Size
(Not available for IMR or Levey Jennings charts.) Specifies a number of observations that make up each subgroup. If the number of observations per subgroup is not constant, you should specify a column in the Subgroup role.
Note: If you specify a Subgroup variable, the platform ignores the setting for the Constant Subgroup Size option.
Chart Specification
(Available only for IMR on Means charts.) Specifies the presummarized charts that are shown in the Control Chart Builder window. See Table 3.5 for the statistic and sigma specifications for each chart.
– Individual on Group Means
– Individual on Group Std Devs
– Moving Range on Group Means
– Moving Range on Group Std Devs
– Median Moving Range on Group Means
– Median Moving Range on Group Std Devs
Dispersion Chart
(Available only for IMR and XBar charts.) Specifies the type of dispersion chart that appears below the chart. For IMR charts, you can choose between no dispersion chart, a moving range chart, or a median moving range chart. For XBar charts, you can choose between no dispersion chart, a range chart, or a standard deviation chart.
Grouping Method
(Available only for Three Way charts.) Specifies the statistic represented by the points on the first chart. The options are Mean and Standard Deviation. See Statistic.
Between Chart
(Available only for Three Way charts.) Specifies the method for computing the between sigma estimate. The options are Moving Range and Median Moving Range. See Sigma and Statistical Details for Three Way Control Charts.
Within Chart
(Available only for Three Way charts.) Specifies the method for computing the within sigma estimate. The options are Range and Standard Deviation. See Sigma and Statistical Details for Three Way Control Charts.
Get Limits
Imports control limits that are stored in an open or saved data table.
Capability
(Not available when a Phase variable is specified.) Performs a Capability Analysis for your data. If this option is selected and you click OK in the launch window, a window is shown. This window enables you to enter the Lower Spec Limit, Target, and Upper Spec Limit values for the process variable.
Launch Windows for Attribute Control Charts
This section contains information about the launch windows for P, NP, C, U, Laney P′, and Laney U′ Control Charts.
Figure 3.6 Launch Window for Attribute Control Charts
For more information about the options in the Select Columns red triangle menu, see “Column Filter Menu” in Using JMP.
Y, n Defective
(Available only for P, NP, and Laney P′ control charts.) Assigns the process variables. The data can be the number defective or the proportion defective. If all of the data is proportional, 0 ≤ Yi ≤ 1, the process variables are not divided by the lot size.
Y, n Defects
(Available only for C, U, and Laney U′ control charts.) Assigns the process variables.
Subgroup
Assigns the subgroup variables. When a subgroup variable is assigned, each point on the control chart corresponds to a summary statistic for all of the points in the subgroup.
Time
Assigns a sample label variable to uniquely label individual measurements. The labels are not aggregated or sorted and appear on the horizontal axis in the same order they appear in the data table.
Note: If a subgroup size greater than one is specified by a Subgroup variable, a constant subgroup size, or the Set Subgroup Size command in a script, the Label variable is ignored.
n Trials
Assigns the subgroup sample size.
Phase
Assigns the phase variable. When a Phase variable is assigned, separate control limits are computed for each phase.
By
Identifies a variable to produce a separate analysis for each value that appears in the column.
K Sigma
Specifies the K value to be multiplied by sigma to form the control limits for the average. By default, K Sigma is set to 3.
Constant Subgroup Size
Specifies a number of observations that make up each subgroup. If the number of observations per subgroup is not constant, you should specify a column in the Subgroup role.
Note: If you specify an n Trials variable, the platform ignores the setting for the Constant Subgroup Size option.
Get Limits
Imports control limits that are stored in an open or saved data table.
Launch Window for Short Run Control Charts
This section contains information about the launch windows for Short Run Control Charts.
Figure 3.7 Launch Window for Short Run Control Charts
For more information about the options in the Select Columns red triangle menu, see “Column Filter Menu” in Using JMP.
Y
Assigns the process variables.
Subgroup
Assigns the subgroup variables. When a subgroup variable is assigned, each point on the control chart corresponds to a summary statistic for all of the points in the subgroup.
Time
Assigns a sample label variable to uniquely label individual measurements. The labels are not aggregated or sorted and appear on the horizontal axis in the same order they appear in the data table.
Note: If a subgroup size greater than one is specified by a Subgroup variable, a constant subgroup size, or the Set Subgroup Size command in a script, the Label variable is ignored.
Product/Part
Assigns the Product/Part variable. When a Part variable is assigned, statistics are calculated for each product, or level of the Part variable. These statistics are used to calculate the control limits.
Phase
Assigns the phase variable. When a Phase variable is assigned, separate control limits are computed for each phase.
Note: If there is a spec limits column property, by default, the same specification limits are used for each phase.
By
Identifies a variable to produce a separate analysis for each value that appears in the column.
K Sigma
Specifies the K value to be multiplied by sigma to form the control limits for the average. By default, K Sigma is set to 3.
Constant Subgroup Size
(Available only for XBar, Three Way, and IMR on Means charts.) Specifies a number of observations that make up each subgroup. If the number of observations per subgroup is not constant, you should specify a column in the Subgroup role.
Note: If you specify a Subgroup variable, the platform ignores the setting for the Constant Subgroup Size option.
Scaling Method
Specifies the scaling method for the control chart. The options are Centered and Standardized.
Get Limits
Imports control limits that are stored in an open or saved data table.
Launch Window for Rare Event Control Charts
Figure 3.8 Launch Window for Rare Even Control Charts
For more information about the options in the Select Columns red triangle menu, see “Column Filter Menu” in Using JMP.
Y
Assigns the process variables.
Subgroup
Assigns the subgroup variables. When a subgroup variable is assigned, each point on the control chart corresponds to a summary statistic for all of the points in the subgroup.
Time
Assigns a sample label variable to uniquely label individual measurements. The labels are not aggregated or sorted and appear on the horizontal axis in the same order they appear in the data table.
Note: If a subgroup size greater than one is specified by a Subgroup variable, a constant subgroup size, or the Set Subgroup Size command in a script, the Label variable is ignored.
By
Identifies a variable to produce a separate analysis for each value that appears in the column.
K Sigma
Specifies the K value to be multiplied by sigma to form the control limits for the average. By default, K Sigma is set to 3.
Get Limits
Imports control limits that are stored in an open or saved data table.