Quality and Process Methods • CUSUM Control Charts • CUSUM Control Chart Platform Options

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CUSUM Control Chart Platform Options
The CUSUM Control Chart red triangle menu contains the following options:
Show Limits
Shows or hides the upper and lower decision limits in the CUSUM Chart.
Show Center Line
Shows or hides the center line in the CUSUM Chart.
Show Shift Lines
(Available only when there is a shift detected in the data.) Shows or hides the lines in the CUSUM Chart that designate shifts. Shift lines are drawn at the start of a shift.
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A positive shift occurs when the value of C+ exceeds the upper limit on the chart. The start of the shift is defined as the first point after the most recent zero value for C+.
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A negative shift occurs when the value of C- exceeds the lower limit on the chart. The start of the shift is defined as the first point after the most recent zero value for C-.
Show ARL
Shows or hides the Average Run Length (ARL) report. See Average Run Length (ARL) Report.
ARL Profiler
Shows or hides a profiler of average run length versus the parameters h and k. If you have specified the Data Units option in the launch window, the profiler plots average run length versus the parameters H and K.
The average run length (ARL) for a specified shift is the average number of runs expected before an out-of-control signal occurs. For example, the ARL at 0 represents the average number of runs expected before a false-alarm signal occurs when the process is in control. When the process is in control, the shift size is 0.
The ARL Profiler enables you to explore how various settings of the parameters affect the performance of the corresponding CUSUM chart. As the parameters in the Control Panel report are updated, the ARL Profiler is updated as well. An ideal CUSUM chart has a high ARL(0) value and a low ARL(Δ) value, where Δ is the size shift that is of interest.
The ARL Profiler depends on the settings of the Upper Side and Lower Side options in the Control Panel report:
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If both the Upper Side and Lower Side options are selected, the profiler represents the average run length for crossing either the upper or lower decision limits on the CUSUM chart.
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If only the Upper Side option is selected, the profiler represents the average run length for the upper decision limit on the CUSUM chart.
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If only the Lower Side option is selected, the profiler represents the average run length for the lower decision limit on the CUSUM chart.
For more information about the options in the red triangle menu next to ARL Profiler, see Profiler in the Profilers book.
Control Panel
Shows or hides a report of the current values of the parameters. This report enables you to change the parameter values as well as the sidedness of the CUSUM chart.
Parameters Report
Shows or hides a report of the current values of the parameters.
Save Summaries
Creates a new data table that contains statistics for each subgroup in the CUSUM chart. The following statistics are saved to the new data table: the subgroup number and size, the subgroup sample mean, an indicator of shift starts, the upper and lower cumulative sums and corresponding consecutive run counts, and the LCL and UCL values.
Reset to Defaults
Resets all parameters back to their default values.
See Redo Menus and Save Script Menus in the Using JMP book for more information about the following options:
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.

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Help created on 3/19/2020