Parametric Analysis

Parametric analysis assumes that your data is Gaussian and requires three prerequisites: Performing correlation analysis, factor analysis, and generating equations. See Correlation Analysis for starting information.

Parametric analysis can be performed from either:

To build a parametric model based on Factor Equations:

1	Choose Analysis > Parametric Analysis > Factor Equations.

2	A dialog box is displayed with three choices: Monte Carlo, Corner, and Parametric Boundary. Choose one.

3	If you select Monte Carlo, you fill in the number of outcomes you want in the field below. If you select Corner or Parametric Boundary, you fill in the number of +/- sigmas you want. When done, choose OK.

4	The Parametric Analysis Results window is displayed. The upper spreadsheet displays the nominal point of a corner or parametric boundary analysis. The lower spreadsheet contains the rows for the samples (or Monte Carlo outcomes) and columns for the parameters.

To build a parametric model based on Regression Equations:

1	Choose Analysis > Parametric Analysis > Regression Equations.

2	A dialog box is displayed with four choices: Parameters Spreadsheet, Monte Carlo, Corner, and Parametric Boundary. Choose one.

3	Choose Parametric Spreadsheet to display the Parametric Analysis Results window with three columns for each parameter: the raw or measured data, the simulated data and the residual (difference) between the two.

4	Before you build a Monte Carlo, Corner, or Parametric Boundary model, you can choose the Input Statistics button to display a dialog box.

5	The Input Statistics dialog box displays the dominant parameters as well as the calculated mean and standard deviation for those parameters. From this dialog box you can change this data by typing in the cells, or choose the Import button to import this data from a text file.

6	When you are ready to build your model, and you select Monte Carlo, fill in the number of outcomes you want in the field below. If you select Corner or Parametric Boundary, you fill in the number of +/- sigmas you want. When done, choose OK.

7	The Parametric Analysis Results window is displayed. The upper spreadsheet displays the nominal point of a corner or parametric boundary analysis. The lower spreadsheet contains the rows for the samples (or Monte Carlo outcomes) and columns for the parameters.