We do not have particular requirements to WSIF , but we are looking for "some way" to improve BPEngine-WS interop in light our performance and transaction requirements. As I understood so far WSIF (to be handled by Jbpm-Bpel) requires additional DOM-Java provider-serializer-bridge , that will not improve performance. So WSIF actually only turns things worse. We can't wait for http://jira.jboss.com/jira/browse/BPEL-135 to be implemented, so we will meanwhile research other opportunities. I 'm not adherent of this Bpel-plain java coexistence and I'll be happy to encourage my managers to probe other opportunities, but main problem is lack of other BP management "de-facto" standard.... anyway, thanks for your answer. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4014941#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...