Configuring the Objectives

You can select the parameters that will be used as objectives during execution. The list of parameters includes all output parameters from the Six Sigma component and output parameters from the subflow components, if they are not mapped to any parameters in the Six Sigma component. Design variables (selected on the Variables subtab) are included in the list of parameters.

The value of the objective function is calculated as a sum of all objective components with corresponding weight and scale factors.

The objective function formula is shown below:

(Objective⁢=Sum⁢(OBJi× Wi⁢/Si),

where OBJi is the i−th objective component (parameter), Wi is the corresponding weight factor, and Si is the corresponding scale factor. Plus (+) is used for minimization and minus (–) is used for maximization of the objective component.

  1. Double-click the Six Sigma component icon .
    The Six Sigma Component Editor appears.
  2. From the Six Sigma Component Editor, click the Optimization tab.
  3. Click the Objectives subtab.
  4. Right-click in the table to access various options for working with objectives.

    For more information, see Setting Table Options.

  5. Perform the following actions, which may vary based on your model design:
    1. Determine which parameters you want to use as objectives by selecting the corresponding check boxes in the first column. Alternatively, you can click Check to add all the selected parameters (including array elements) as objectives. To clear all the parameters, click Uncheck.

      If no parameters are selected, you will be prompted to add all parameters as objectives.

      When a subflow parameter is selected as an objective, a corresponding parameter is created in the Six Sigma component and Optimization component.

    2. Click the Direction column to specify whether or not you want to minimize the objective, maximize the objective, or set a target for the objective.
    3. If you selected target in the Direction column, set the objective’s target in the corresponding column.
    4. Set the objective’s Scale Factor and Weight Factor in the corresponding columns.
  6. If desired, click Edit at the bottom of the editor to set objective options.

    For more information, see Editing Attributes for Multiple Parameters.

  7. If desired, map any of these objective attributes to parameters.

    For more information, see Mapping Options and Attributes to Parameters.

  8. Click OK to save your changes and to close the Six Sigma Component Editor.

    When Six Sigma Optimization is chosen and you click OK or Apply for the first time, the model is modified by embedding the Six Sigma component under an Optimization component. All optimization criteria are copied to the Optimization component and all selected parameters will be mapped up to the Optimization component. The optimization criteria can still be changed in the Six Sigma Component Editor.