To Generate Approximation Values
To obtain approximate values for a single point:
1. Click Tools > Approximation Value. The Approximate Evaluation dialog box opens.
2. For the design variables that you want to set for your evaluation, select the current value of the variable and type in the desired value.
3. Click
Run >
Approximate or click
to generate approximate values. The system estimates values for the design goals and fills out the
Design Goals table.
4. To reset values for the design variables, click Run > Reset values.
|  To generate exact values, click Run > Exact or click the  icon. |
To conduct a sensitivity analysis on approximate values:
1. Click Tools > Approximation Value. The Approximate Evaluation dialog box opens.
2. Select a design variable and a design goal for which you want to generate a graph.
3. Click the
icon to plot a graph. The graph shows points with estimated results and a curve that approximates these results.
| If you want to obtain a smoother curve, you can increase the noise level (deviation of the plotted curve from estimated points). If you want to obtain a curve that approximates estimated results with more accuracy, you can decrease the noise level. |
4. To set the noise level, click
Tools >
Preferences from the
Approximate Evaluation dialog box. Set the value in the
Preferences box and click
OK. You can now generate another graph by clicking the
icon.