Sorry, i forgot to mention two things: i'm working with jpdl 3.1.7 and with jbpm-simulation, so i don't only have a processdefintion, i also have a experiment-definition.

i found http://docs.jboss.com/jbpm/v3/userguide/tutorial.html#taskassignmentexample this example and it is said that i'm supposed to add a few lines of code, but since everything in my project looks a bit different, this example doesn't work for me.

Okay, i figured out how to implement an assignment:

<task-node name="endoskopie">
     <task name="endoskopie">
          <assignment class='org.jbpm.sim.tutorial.business.newProcess.DoctorAssignmentHandler' />
     </task>
     ...
</task-node>

public class DoctorAssignmentHandler implements AssignmentHandler {

    @Override
    public void assign(Assignable assignable, ExecutionContext executionContext)
            throws Exception {
        
        assignable.setActorId("doctor");
    }

}

But now i have additional questions:

-How can i tell jpdl, that the doctor used in the assignment is the same as in the swimlane doctor?

-If no doctor is available, how can i tell jpdl, that it should use another role, e.g. a nurse?

Thanks in advance