You can have a setup rule with high-salience or specific agenda-group (or whatever other flow control mechanism you want) firing first and setting the values in its consequence, but you MUST fire this rule before asserting your facts into the working memory, because I guess you will be using these globals in the LHS of other rules. So the code of your application would be like: * create rulebase * create session * set focus on "setup" * fire setup rule * assert facts * fire rules The setup rule would be like: rule "setup rule" agenda-group "setup" when then // set globals like this: drools.getWorkingMemory().setGlobal( "myGlobal", someValue ); end []s Edson 2008/9/30 Gary Napier <gnapier(a)cis.strath.ac.uk&gt; -- Edson Tirelli JBoss Drools Core Development JBoss, a division of Red Hat @ www.jboss.com