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Ansoft Designer / Ansys Designer 在线帮助文档：

Optimetrics >
   Setting up a Statistical Analysis >
       Setting the Distribution Criteria >
           Overriding the Distribution Criteria for a Single Statistical Setup

Overriding the Distribution Criteria for a Single Statistical Setup

To override the default distribution criteria for a single statistical setup:

1. In the Setup Statistical Analysis dialog box, click the Variables tab.

All of the variables that were selected for statistical analysis are listed.

2. Select Uniform or Gaussian in the Distribution column for the variable you want to override.

If you changed the distribution type, the Override option is now selected. This indicates that the distribution type you selected will be used for this Optimetrics analysis; the current distribution type selected for the variable in the nominal design will be ignored in this statistical analysis.

• Alternatively, you can select the Override option first, and then select a different distribution type in the Distribution text box.

3. Optionally, if you want to change the distribution criteria, click in Distribution Criteria column for the variable you want to override.

The Edit Distribution dialog box appears.

4. If the distribution type is Gaussian, do the following:

a. Type the standard deviation in the Std. Dev text box.

b. Type the lower limit of the distribution in the Low Cutoff text box.

c. Type the upper limit of the distribution in the High Cutoff text box.

Designer will solve design variations using a Gaussian distribution within the low and high cutoff values.

5. If the distribution type is Uniform, do the following:

• Type a tolerance value in the text box.

Designer will solve design variations within the tolerance range of the starting value, using an even distribution.

6. Click OK.

To revert to the default distribution settings, clear the Override option.

See Statistical Cutoffs for additional information.

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