Process Quality Snapshot

The Process Quality Snapshot

provides the process control details associated with a measure. Includes control charts, capability analyses, and Pareto charts. You can initiate the recalculation of control limits for the control charts from this report.

In This Topic

Details
Save and manage filters
Advanced filters for descriptors
Control Charts
Capability Analysis
Pareto Charts

Details

The Process Quality Snapshot is available through the Engineering portal and has the following main areas.

This view has the capability analysis tab open.

1: General settings: The display settings are in a pane that can be expanded to change settings and collapsed to view the reports more easily. Select the stations of interest and their start and end times for the quality analyses. You can also add advanced filters to the display.
2: Station filter settings: You can save and manage the filter settings.
3: Measure and analyses settings: Display the analyses by measure, station, and operator. Switch between tabs to see control charts, capability analyses, and assignable causes.
4: Export data: You can export the data from the selected time range to a Minitab worksheet (MWX) or to a CSV file.
5: Analysis display: View the analyses. You can access and edit the data from this view. For more information, go to Edit observations.
6: Settings and options: Select the icon to the right of a control chart to recalculate control limits from current data or to open the control chart options.
Select the Settings icon to the right of a capability analysis to modify the capability analysis options.

Note

Real-Time SPC may limit the amount of data that is shown in the control charts to ensure optimum readability. To display more data, if available, select the link in the footer of the chart.

Save and manage filters

Select the filter settings to view station performance. You can select the time frame for this report and the products, processes, and stations of interest. Complete the following steps to save your filter selections as a view.

Select the time frame, products, processes, and stations.
Select Save Filter .
Enter a name for your new filter and decide whether to set as the default view.
Select OK.
Select Manage Filters to delete filters or set a new default filter.

Advanced filters for descriptors

Select the filter settings to view station performance, filtered by descriptors. Complete the following steps to add filters by subgroup descriptors.

Under Advanced Filters, select Add filter.
Enter the operators and descriptors to use in the filter.

Control Charts

View control charts for the measures of the selected stations. Select the measure of interest and choose whether to view by each station or by each station and operator.

The control chart pane is interactive. You can select a single selected point, a range of points, or the entire chart.

Select a single point to see the individual observations represented by the point. If the point is a flagged point, you can also see the assignable causes, corrective actions, and comments.
Select a range of points to see the summary statistics for the selected points. When in Edit mode (Edit Parameters), you can use these estimated parameters to update the center line and control limits, or you can provide the parameters if you have historical data.

Note

Control chart points with assignable causes are not used in the control limit calculations.

For more information on recalculating control limits from data or historical parameters, go to Use recent data to recalculate control limits.

Capability Analysis

View capability analyses for the measures of the selected stations. Select the measure of interest and choose whether to view by each station, each station and operator, or a single analysis for all stations.

You can add confidence intervals for the capability indices for this analysis. Also, you can transform your data to fit a normal distribution to satisfy the assumptions for this analysis. To change the default display settings for all capability analyses, go to Capability analysis preferences.

Pareto Charts

View Pareto charts for assignable causes and corrective actions for continuous measures and for the defect and defective types for attribute measures. Select the measure of interest and choose whether to view by each station, each station and operator, or a single analysis for all stations.

Assignable Causes: View Pareto charts for assignable causes and corrective actions for the measures of the selected stations.
Defect or Defective Types: View Pareto charts for defect or defective types at the selected stations.

If you have many categories with small counts, you can set a percentage to combine these categories into a summary category called "Other".