Enabling and Configuring Test Accuracy Ratio (TAR) for a Service Capability

  1. Navigate to the Parameter:

    • Go to a measurement parameter that has been configured for a service capability.
    • Access the Display/Acceptance tab within the parameter settings.

  2. Enable TAR Display:

    • Check the box for Display Test Accuracy Ratio (TAR) to allow the TAR to appear in the "as found/left" data form.

  3. Set Acceptable TAR Ratio (Optional):

    • To specify a maximum acceptable TAR for passing:
      • Check the box for Acceptable TAR varies by service level.
    • Note: This is optional if the TAR only needs to display without a pass/fail requirement.

  4. Define TAR by Service Level:

    • If you checked the "Acceptable TAR varies by service level" box, go to the Service Preferences tab of the service capability.
    • Click on N/A under the TAR column to input the acceptable ratio, expressed as a comparison to 1 
    • Click Save.
    • Repeat these steps for the "as left" condition and any other service levels needing TAR settings.


Setting Tool Accuracy for Reference Standards

  1. Locate the Tool:

    • In the Asset Manager, find the tool (reference standard) needed for the measurement parameter.
    • Click on the Role tab, then select the relevant parameter.

  2. Add Tool Range and Mode:

    • Navigate to the Tool Range tab. (If this tab isn’t visible, contact support to enable the feature).
    • Click Add Range/Mode and enter the following information:
      • Tool Range/Mode: Provide a description
      • Subtitle: Name the range (informational only).
      • Range Min: Minimum reading input for the range in the "as found/left" data form.
      • Range Max: Maximum reading input for the range in the "as found/left" data form.
      • Resolution: Specify resolution if applicable.
      • Uncertainty: Input the uncertainty value for budget calculations.
    • Click OK to save.

  3. Set Accuracy for Input Range:

    • Under the Accuracy column, click on the value field to open the accuracy setup screen.
    • Select the type of accuracy (e.g., percentage, fixed value) and enter the corresponding accuracy value for the standard.
    • Click OK to confirm.
    • Repeat for any additional ranges that require accuracy values.



Applying the Configured TAR and Tool Accuracy in Work Items

  1. Assign Service Level and Tool:

    • When a new service level with TAR settings is applied to a work item, ensure that accuracy is set for the work item.
    • Select the tool with the configured ranges.

  2. Verify TAR Display:

    • The TAR ratio (e.g., 1:1) will be displayed in the work item if the tool and Unit Under Test (UUT) accuracy match. For instance, a tool with +/-1 F accuracy compared to a UUT with the same accuracy will show a 1:1 TAR ratio.



These steps should configure and display the Test Accuracy Ratio (TAR) as per the required service level and reference standards for accurate monitoring and comparison in the work item.