Changing the Distribution Criteria for Every Statistical Setup

To change the default distribution criteria for every statistical setup:

1. Make sure that the variable's distribution criteria are not being overridden in any statistical setup.
2. If the variable is a design variable, do the following: On HFSS> Design Properties, select Statistics.

   If the variable is a project variable, do the following: Click Project> Project Variables.

   The Properties dialog box appears. Then, select Statistics.

3. Click in the Distribution column for the variable you want to change, and then select Uniform, Gaussian, Lognormal, or User Defined.
4. Optionally, if you want to change the distribution criteria, click in the Distribution Criteria column for the variable you want to change.

   If the distribution type is Gaussian, the Gaussian Distribution dialog box appears. If the distribution type is Uniform, the Uniform Distribution dialog box appears.

5. If the distribution type is Gaussian, do the following:
   1. Type the lower limit of the distribution in the Cutoff Probability text box. This is a value =>0 and < 0.1.
   2. Type the mean value of the distribution in the Mean text box.
   3. Type the standard deviation of the distribution in the Std Dev text box.

   The design variations are solved using a Gaussian distribution within the specified mean and standard deviation values.

   

6. If the distribution type is Uniform, do the following:
   1. Type a cutoff probability value in the Cutoff Probability text box.
   2. Type mean and tolerance values in the corresponding text boxes.

   The design variations are solved within the tolerance range of the starting value, using an even distribution.

7. If the distribution type is Lognormal, do the following:
   1. Type a cutoff probability value in the Cutoff Probability text box.
   2. Type values for Sigma, M, and Theta in the corresponding text boxes.
8. If the distribution type is User Defined, do the following:
   1. Type a cutoff probability value in the Cutoff Probability text box.
   2. Click Edit XY Data to open the Edit Dataset dialog box.
   3. Either type or import the X and Y data values for the distribution in the Edit Dataset dialog box.
9. Click OK.