First, excuse my english , because i am french.

Suppose that we have a simple election system :

<task-node name='vote'>

 <task name='voice1' swimlane='alice'/>
 <task name='voice2' swimlane='bob'/>
 <task name='voice2' swimlane='martin'/>

 <transition name="case1" to="case1"/>
 <transition name="case2" to="case2"/>

<task-node>


<task-node name="case1">
...
<task-node>

<task-node name="case2">
...
<task-node>

The three tasks can be executed in parallel, but the choice of the next node is not based on majority, it's done on the choice of the last execution :

alice executes : taskinstance.end("case1"); and wait
bob executes : taskinstance.end("case1"); and wait

and

Now martin had to execute his task :
taskinstance.end("case2");

The process goes to the "case2" task-node beacause it was the last choice.

How I should do to make choice based on the number of choosen transition instead of on the lastest choice.