Reviewing Control Plan Performance

Page Name	Definition Name	Usage
Selection Criteria Page	QS_STRMRVW_SEL	Select a control plan and specify the timeframe from which you want to extract information.
Stream Review Page	QS_STRMRVW_GEN	View summary information for all process streams in the control plan.
Compare Data Statistic Page	QS_ANLZ_STSSUM_SPG	Select the statistic for comparison. Stream Review Page
Compare Dataset Statistics Page	QS_BARGRAPH_RVW	View a bar graph comparing the selected statistics for all characteristics in the control plan. Stream Review Page
Subgroup Detail Page	QS_SGRP_DET_PNL	View subgroup results associated with a selected process stream.
Basic Statistics Page	QS_STRMRVW_STS	View basic statistics by stream.
Capability Indices Page	QS_STRMRVW_STS2	Display capability indices by stream.
Attributes Statistics Page	QS_STRMRVW_STS4	View attribute statistics associated with the defects or defectives characteristics for the control plan.

You can monitor process performance using the Review Control Plan Performance component. For example, you can assess key statistics, perform graphical analysis, and, if needed, post probable causes and corrective actions. The inquiry is similar to creating a quality data extraction, but does not require the SQL-like qualification of plan hierarchy fields. Instead, you enter the specific hierarchy field values related to the control plan. These pages produce a quick snapshot of the process data over a specified period of time.

In addition, the process information on these pages can be downloaded in the form of a quality application client dataset and used for exploratory analysis off-line.

Note: This option is available if the Quality application client is installed.

Use the Selection Criteria page (QS_STRMRVW_SEL) to select a control plan and specify the timeframe from which you want to extract information.

Navigation:

Quality > Analyze Quality Results > Review Ctrl Plan Performance > Selection Criteria

Select the specific hierarchy fields in the upper portion of the page associated with the control plan for which you want to review performance. The hierarchy fields vary depending on the quality function that you select.

Field or Control	Description
Select Sessions By	Select the time frame for which you want to view the control plan performance. Values include: All Subgroups: Retrieves all subgroups for the process. Note: Selecting All Subgroups against high-volume processes may cause longer processing times. Daily Window: Retrieves data starting from a specified number of days from the current date and time. Enter the number of days to subtract from the current date in the Review Period Days field. Specific Date Range: Selects data within a specific date range. Enter the date from and from time, as well as the date to and to time. Subgroup Window: Selects the most current N subgroups completed. Enter the number of subgroups that you want in the Number of Subgroups field.

Field or Control

Description

Select Sessions By

Select the time frame for which you want to view the control plan performance. Values include:

All Subgroups: Retrieves all subgroups for the process.

Note: Selecting All Subgroups against high-volume processes may cause longer processing times.

Daily Window: Retrieves data starting from a specified number of days from the current date and time. Enter the number of days to subtract from the current date in the Review Period Days field.

Specific Date Range: Selects data within a specific date range. Enter the date from and from time, as well as the date to and to time.

Subgroup Window: Selects the most current N subgroups completed. Enter the number of subgroups that you want in the Number of Subgroups field.

Use the Stream Review page (QS_STRMRVW_GEN) to view summary information for all process streams in the control plan.

Navigation:

Quality > Analyze Quality Results > Review Ctrl Plan Performance > Stream Review

Field or Control	Description
Comparative Analysis	Click this link to view a bar graph comparing selected statistics for all characteristics in the control plan.
Characteristic (Display Detail)	Click this link to access the Subgroup Detail page for that characteristic. The Subgroup Detail page lists the subgroup values that you selected and used to calculate the summary display.
Stream ID	Displays a unique process stream that was defined by the system.
LSL (lower specification limit)	Displays the current lower specification limit.
USL (upper specification limit)	Displays the current upper specification limit.
Subgroups	Displays the number of subgroups the system retrieves and uses for performance estimates.
Alarms	Displays the number of alarms occurring for the subgroup during the time period.
Display Graph	Select the type of graph that you would like to review for this characteristic. Values are Control Chart, Histogram, Pareto of Alarms, Pareto of Comments, Pareto of Corrective Actions, Pareto of Defects, and Pareto of Probable Causes.

Use the Subgroup Detail page (QS_SGRP_DET_PNL) to view subgroup results associated with a selected process stream.

Navigation:

Click the Characteristic (Display Detail) link on the Stream Review page.

Field or Control	Description
Date Submitted	Displays the date and time that the subgroup was entered.
Subgroup Size	Displays the subgroup sample size.
Chart 1 Result	Displays the calculated subchart 1 plot value.
Chart 2 Result	Displays the calculated subchart 2 plot value.
Test Violations	Displays the number of test violations detected for this subgroup.
Action Count	Displays the number of corrective actions logged against this subgroup.

Use the Basic Statistics page (QS_STRMRVW_STS) to view basic statistics by stream.

Navigation:

Quality > Analyze Quality Results > Review Ctrl Plan Performance > Basic Statistics

Field or Control	Description
Observations	Displays the number of discrete observations used to in the statistical calculations.
Mean	Displays the statistical mean.
Range	Displays the range.
Sigma	Displays the standard deviation.
Skewness	Displays the skewness.
Kurtosis	Displays the kurtosis.

Use the Capability Indices page (QS_STRMRVW_STS2) to display capability indices by stream.

Navigation:

Quality > Analyze Quality Results > Review Ctrl Plan Performance > Capability Indices

The system displays the process capabilities that are industry-accepted estimates calculated for each characteristic in the control plan.

Field or Control	Description
Cp	Process potential.
Cpk	Process capability.
Cpl	Lower process capability.
Cpu	Upper process capability.
Cr	Capability ratio.
Est % Total (estimated percent total), Est % Below (estimated percent below), and Est % Above (estimated percent above)	Displays the estimated total percentage of units predicted to be out of specification.

Use the Attributes Statistics page (QS_STRMRVW_STS4) to view attribute statistics associated with the defects or defectives characteristics for the control plan.

Navigation:

Quality > Analyze Quality Results > Review Ctrl Plan Performance > Attributes Statistics

Note: The statistics are only calculated for characteristics that have a data type of defects or defectives—count data.

Field or Control	Description
Sum Subgroup Size (sum subgroup size)	Displays a tally of all subgroup sizes entered for each subgroup retrieved by the inquiry.
Sum Defects	Sum total of all defects.
Defects/Unit, Defects/100, Defects/1000, and Defects/Million	Statistics include defects per unit, hundred, thousand, and million.

Reviewing Control Plan Performance

Pages Used to Review Control Plan Performance

Understanding the Control Plan Performance Component

Selection Criteria Page

Stream Review Page

Subgroup Detail Page

Basic Statistics Page

Capability Indices Page

Attributes Statistics Page