First of all, are you referring to eclipse plugin and its property view? If so, what version of the plugin do you use?
In my opinion, I do not think it is used. in jBPM5 (BPMN2) there are timer events (boundary and intermediate) that provides time based activities. So, if you are looking for such activities you should focus on the events.
Thank you for replying,
Yes I was referring to eclipse plugin, I'm using the default version with comes with default jbpm installer (eclipse plugin 5.2.final and 5.3.1.final).
I also think it's not used, I just wanted to confirm. Actually I am using timers and events, it will simplify my process model if this option was implemented.