good research. all your points are correct afaict. we don't have diff calculation between two business dates. because for process language purposes, we only need addition. if it's easy for us to incorporate your business time diff functionality, we're interested if there is at least 1 unit test case that shows the feature. you'll have to sign the contributors agreement in order to contribute it directly. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4078315#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...