Precondition

A precondition is a true-false test associated with one step of an activity. During activity execution, the system evaluates the precondition to determine whether to execute or skip the method referenced in the step.

A precondition is a reference to a when condition rule (Rule-Obj-When rule type) or an expression that evaluates to True or False. After the previous step of an activity executes, but before the method in the current step executes, the system evaluates the when condition or expression. If the result is false, this step is skipped and processing continues at the next numbered step.

On the Steps tab of the Activity form, the icon identifies the precondition column. Within a step row, the icon indicates that a precondition is defined and enabled for a step. When the row is activated, click to add a precondition or click to access the details of a precondition.

	activity, expression, step, transition
	Activity form — Completing the Steps tab — Preconditions.

Definitions