Thank you for your ideas. Unfortunately the forseen definition of 'lead time' is rather complex. It should be possible to configure, that certain sub-processes, tasks and even transitions are 'counted' while others are not. It must be possible to decide if the lead time counts paralel processes twice or just once(Resource-View vs. Customer-View) and even Business-Calendars(preferdly user-indivdual) must be taken into account. Also a problem is that Process-Definitions are subject to change and also the lead-time definitions, so i need a very 'universal' solution. What do you mean by 'building your own language on top of the PVM'? Sry if im a noob, but i have no idea what PVM is. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4138775#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...