Boundary Event (External Trigger Event) is a type of event defined in the Kuika Process Automation module depending on a task or a work step, triggered when a certain event occurs. These events are used to provide additional conditions or alternative paths in the process flow. A Boundary Event is located in the outer frame of the task to which it is attached and when the defined condition or event occurs, it activates an alternative workflow without the main task continuing. For example, when a certain time is exceeded or an error occurs, the process is redirected to a special flow managed by the Boundary Event.