Process Screening Platform Options

The Process Screening red triangle menu contains options to customize the display and to save calculated statistics.

Shows or hides the Summary table. See The Process Screening Report.

Enter search strings for columns that you entered as Process Variables or Grouping in the launch window. A panel appears for each column. The corresponding processes are selected in the Summary table.

Quick Graph for Selected Items

Plots small graphs of the processes that you select in the Summary table in a Graphs of Selected Items report. The report makes it possible to view and compare many processes at once. The plots are ordered according to their order of entry on the launch window.

Control Charts for Selected Items

Opens a Control Chart Builder report window for the processes that you selected in the Summary table. The control chart corresponds to your selections in the Process Screening launch window.

Process Capability for Selected Items

Opens a Process Capability report window showing Individual Detail Reports for the processes that you select in the Summary table. If you select a process for which specification limits are not specified, a Spec Limits window appears. In this window, you can specify specification limits by selecting a data table or entering values directly.

The Process Capability analysis assumes normal distributions and uses within sigma values that correspond to your Control Chart Type selection in the Process Screening launch window:

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Moving range for Indiv and MR

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Average of ranges for XBar and R

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Average of unbiased standard deviations for XBar and S

Color Selected Items

Applies a color of your choosing to the values in the selected rows of the Summary table.

Show Tests

Shows or hides test results for Nelson tests that are selected under the Choose Tests option in the Process Screening report’s summary table.

Choose Tests

Enables you to choose the tests that you want to include in the calculation of Alarm Rate and Any Alarm.

Tip: To select multiple tests, press the Alt key and click the Process Screening red triangle to open a menu of all platform options.

Shift Detection

Provides options for detecting shifts after outlier removal. See Shift Magnitudes and Positions.

Largest Upshift

Adds columns for Largest Upshift and Upshift Position to the Summary table. The largest upward shift in the series that exceeds one within-sigma unit is identified. See Shift Magnitudes and Positions.

Largest Downshift

Adds columns for Largest Downshift and Downshift Position to the Summary table. The largest downward shift in the series that exceeds one within-sigma unit is identified. See Shift Magnitudes and Positions.

Shift Graph

(Available only when some processes have shifts that exceed the Shift Threshold.) Shows a plot of the time occurrence of all process shifts that exceed the number of within-sigma units specified by the Shift Threshold (three by default). Green markers indicate upshifts and red markers indicate downshifts. The markers are located at the local peaks of the shifts.

To identify the processes that correspond to one or more shift occurrences, select the points and click Select Process. The corresponding processes are selected in the Summary table. Processes that have no shifts exceeding the Shift Threshold number of within-sigma units are not plotted.

Note: The Shift Graph does not show the positions of Largest Upshift and Largest Downshift values that appear in the Summary table if the shifts are less than the specified Shift Threshold number of within-sigma units in magnitude. See Additional Example of Process Screening.

Show Shifts in Quick Graphs

(Available only when a Shift Graph has been added to the report window.) Shows the location of the shifts in the Quick Graphs using green and red vertical lines.

Process Performance Graph

Shows a four-quadrant graph that assesses the performance of processes in terms of stability and capability. Each process for which specification limits are provided is represented by a point. Its horizontal coordinate equals the stability ratio of the process and its vertical coordinate equals the capability of the process, given as Ppk. The graph is divided into four quadrants based on the following default boundaries:

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A stability ratio that exceeds 1.5 indicates that the process is unstable.

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A Ppk that is smaller than 1.33 indicates that the process is not capable.

Selecting points in the graph selects the corresponding processes in the Summary table.

Process Performance Graph Boundaries

Opens a window where you can set your desired values for the Process Performance Graph’s stability ratio and Ppk capability boundaries.

Tip: You can set preferences for your desired boundaries for Stability Ratio and Ppk Capability in File > Preferences.

Save Summary Table

Saves all of the information that can appear in the Summary table to a Process Summary data table. The Process Summary data table also contains specification limit details, if these are specified for at least one process.

Save Details Table

Saves detailed information about control chart calculations to a Process Details data table. For each combination of a process and grouping variables, the table contains a row for each subgroup showing:

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The values of the subgroup sample statistics.

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The control limits.

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The subgroup size.

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A list of indicators for which, if any, alarms were triggered. Alarms for the Nelson tests are indicated with the numbers for the tests. An alarm for the Range Limit Exceeded test is indicated with an R.

Save Selected Details

For the selected rows in the Summary table, saves a Process Details table with the information that is saved when you select Save Details Table.

See Local Data Filter, Redo Menus, and Save Script Menusin the Using JMP book for more information about the following options:

Local Data Filter

Shows or hides the local data filter that enables you to filter the data used in a specific report.

Redo

Contains options that enable you to repeat or relaunch the analysis. In platforms that support the feature, the Automatic Recalc option immediately reflects the changes that you make to the data table in the corresponding report window.

Save Script

Contains options that enable you to save a script that reproduces the report to several destinations.

Save By-Group Script

Contains options that enable you to save a script that reproduces the platform report for all levels of a By variable to several destinations. Available only when a By variable is specified in the launch window.