Rockwell Automation Arena OptQuest Users Guide - Manual (Page 37)

4 • S ETTING U P AND O PTIMIZING A M ODEL
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4. When you click the Check Expression button, the expression is verified. Errors are
reported in a message box and an error indicator will appear next to the expression
box.
5. Be sure to select either Minimize or Maximize (the default) to define the goal of the
objective.
6. Click OK to accept the Objective edits. The expression will be checked for validity
when OK is clicked. If the expression is invalid, it will appear in yellow in the
Objective Summary grid.
Selecting optimization options
The controls governing the optimization run are accessed through the Options node. The
Options Editor displays three sections of control options. They are described below.
Optimization Stop options
The stop options let you control how long the optimization will run. You can select more
than one stop option; the optimization will stop when the first stop condition is satisfied.
At least one stop option must be selected.
Tolerance
This value is used to determine when two solutions are equal. The default setting is
0.0001.
Number of simulations When you select this option, select a number from the menu or enter the
number of simulations you want to run. The default is 100 simulations.
Manual stop Lets you manually terminate an optimization by selecting Run > Stop.
You can always manually terminate an optimization even if you have set
other stopping criteria.
Automatic stop When you select this option, OptQuest stops automatically when there
has been no significant improvement in the best value after 100
simulations. The Tolerance value defines the criteria for determining
when solutions are considered equal.
Run only suggested
solutions This option is available if you have defined and included suggested
solutions. When this option is checked, only the suggested solutions are
evaluated. The number in parentheses indicates the number of suggested
solutions. When this option is checked, no other option stop choices are
available.