A workflow condition that enforces separation of duties (for SAS-70 compliance), i.e. it makes sure that the same user cannot trigger two incompatible transitions on the same issue.
When you add this condition on a transition, the add-on checks whether the current user has triggered any transitions between the specified From
and To
statuses. In case it finds that a transition has been triggered between the two statuses, then the transition on which the condition is placed will be hidden from the user.
In short, the selected transition will be available to the user, as long as the user does not trigger any transition between the two specified statuses.
Refer Use cases for conditions page for use cases of this condition.