Configuring the Adaptive DOE Technique

You can configure the Adaptive DOE technique options.

  1. Double-click the DOE component icon .
    The DOE Component Editor appears.
  2. From the General tab's DOE Technique list, select Adaptive DOE.
  3. In the DOE Technique Options area, enter the Number of Points that you want to study. For each defined factor, values are varied between the specified lower and upper values in order to maximally fill the search space.
  4. Enter the Significant Step Size to control the minimum distance between any two points in the search space. This value is a fraction of the domain (upper bound minus lower bound) of each factor. Significant Step Size must be a positive number. Make the Significant Step Size smaller (e.g. 0.001) so that it can find more subtle gradients. Make the Significant Step Size larger (e.g. 0.05) so that it filters noise.
  5. Specify a Prior Design Points File if you want to prescribe an arbitrary set of previously run design points that the Adaptive DOE space-filling algorithm should avoid when calculating the design matrix. The file format is the same as a DOE results data set generated using the DOE post-processing option Write experiment data to a file.
  6. Click Use a fixed seed Select this option to manually specify the seed in the corresponding text box. Type the value of the random seed in the corresponding text box. If this option is not selected, Isight determines the seed randomly.
    Note: A fixed seed can also be set and used for the entire model. If a fixed seed is set for the model and also defined separately in the DOE component, Isight uses the one defined in the DOE component. If a fixed seed is set for the model and this option is not selected, the sequence of random numbers is based on the model’s random seed (and, thus, isstill reproducible).

    For information about setting a fixed seed, see Setting the Execution Options in the Isight User’s Guide.

  7. Click OK to save your changes and to close the DOE Component Editor.
    Note: This will create an output file parameter called DOE_Guidance.txt. This output file shall contain the suggested search box for next Adaptive DOE iteration.