All, I made a short post on how to write rules and how to detect possible problems with it. It is really short and a bit highlevel (abstract), but the subject is open and very extensive. http://markproctor.blogspot.com/ I'm thinking in eventually following up with real examples/use cases, showing how to implement rules using known patterns (http://wiki.jboss.org/wiki/Wiki.jsp?page=UsagePatterns). So, if you have a case you would like us (I will get other people involved as needed) to analyze and provide some suggestions and you think that others would benefit from your case, feel free to send me a description of the use case and the business rules involved. I will try to make a didactic example of it and post. Plz send me in PVT so to not flood the list. Thank you, Edson -- Edson Tirelli Software Engineer - JBoss Rules Core Developer Office: +55 11 3124-6000 Mobile: +55 11 9218-4151 JBoss, a division of Red Hat @ www.jboss.com