Configuring the Constraints

You use the Constraints tab to select the parameters that will be used as constraints during execution.

For the Pointer Automatic Optimizer technique, you can only define 500 constraints. The other techniques do not have a limit on the number of constraints that you can define.

  1. Double-click the Optimization component icon .
    The Optimization Component Editor appears.
  2. From the Optimization Component Editor, click the Constraints tab.

    The list of parameters includes all output parameters from the Optimization component and output parameters from the subflow components, if they are not mapped to any parameters in the Optimization component. When any subflow parameter is selected as a constraint, Isight creates a corresponding parameter in the Optimization component.

  3. Right-click in the table to access various options for working with constraints.

    For more information, see Setting Table Options.

  4. Perform the following options, which may vary based on your model design:
    1. Determine which parameters you want to use as constraints by selecting the corresponding check boxes in the first column. Alternatively, you can click Check to select all the selected parameters as constraints. To clear all the parameters, click Uncheck.
    2. Set the Lower Bound and Upper Bound in the corresponding columns.
    3. Set the constraint’s Target in the corresponding column.
    4. Set the constraint’s Scale Factor and Weight Factor in the corresponding columns. Scale factors are used to bring constraint values to the same order of magnitude to improve the efficiency of the optimizers. Weight factors are used to change the importance of various constraints.

      The value of each constraint is calculated as follows:

      • Constraint  Value⁢(Lower⁢Bound) =(LB−Parm)×W/S
      • Constraint⁢ Value⁢(Upper⁢Bound) =(Parm−UB)×W/S
      • Constraint⁡ Value⁢(Target) =(Parm−T)×W/S

      where LB is the lower bound value, UB is the upper bound value, T is the target value, Parm is the parameter value, W is the weight factor, and S is the scale factor.

  5. If desired, click Edit at the bottom of the editor to set attribute values for multiple constraints.

    For more information, see Editing Attributes for Multiple Parameters.

  6. If desired, map any of these constraint attributes to parameters.

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

  7. Click OK to save your changes and to close the Optimization Component Editor.