Use this dialog box to set up design checks that you can use to check your alignment or profile design against its associated design criteria.
The tables contained in the design criteria file contain most of the criteria used for alignment and profile design. Other criteria must be checked using mathematical expressions, which in the context of criteria-based design are known as design checks.
Design checks are created and managed in the same manner as label expressions. To apply a design check to an alignment or profile, you must add it to a design check set.
Design checks differ from label expressions in that they always return a true or false value. For example, a design check may be created to verify minimum tangent length. If a tangent length is greater than or equal to the minimum value defined in the design check, no notification is issued. If a tangent length is less than the minimum value defined in the design check, a warning notification is issued.
Do not enter functions, constants, or logical operators inside the { } brackets that surround Properties such as {Minimum Radius}.
To set up a design check, you can use the buttons in the dialog box and the keypad on your keyboard. There are menus in the dialog box from which you can choose Properties and functions to insert into the design check.
If you enter a combination of items that is invalid, a parse error appears when you click OK.
Because design checks return either a true or false value, they must contain one of the following logical operators: > (greater than), < (less than), >= (greater than or equals), <= (less than or equals), != (not equals), = (equals).
Specifies a name for the design check.
Specifies a description that appears in the Settings tab item list view.
Displays the design check as defined from the functions and properties. You can also click in this box and enter characters such as numbers.
Enter numbers and logical operators into the Design Check box to define the expression.
Inserts a property into the design check. Click the icon to display a list of properties relevant to the design check type. Select a property to insert it into the design check.
Inserts a function into the design check.