BPMN11 — Extending activities with execution time (traversal time) attributes?

Is there a plan for extending activities with execution time (traversal time) attribute???
I mean is to put time on the activities which show how long they will take to finish. Maybe two attributes for the best and worst case (minimum and maximum traversal time).
I can imagine a system, which allows displaying accumulated time for every sub process and task, for every separate flow path with minimum and maximum traversal time.
It is more or less easy to find out estimated time for primitive tasks but it is really hard work to calculate possible execution time for whole process for synchronization purposes.
So when you simulate the whole process at the end you will see how long the process will take in best and worst case.
It is an excellent feature for process estimation. I realize the problems of implementing of such functionality because of merging of sequence flows but anyway it could be great feature.
Unfortunately process execution time (traversal time) is still not supported by BPMN specification but you don’t need to be an oracle to predict that the idea will come through in the closest future.

Suggested Resolution:
Close, No Change: This issue is out of scope for the RTF and will be addressed by the response to
the BPMN 2.0 RFP.
Revised Text: None
Disposition: Closed, deferred