Each of the ControlSystem CS_Process_Events has a power attribute with the following values:
<ul>
<li>0 - <b>no power</b> - (pending event which must obey the process order with no duplication and no reverting)
<li>1 - <b>revertible</b> - (pending event which may update a later event in the process)
<li>2 - <b>duplicable</b> - (pending event which may repeat, looping back to an earlier state)
<li>3 - <b>final</b> - (final event - nothing more happens to the case)
</ul>