Tobias, I believe that this is more than a flow question. The answer depends on another question: what is taking too much time to execute? The evaluation of the rules in A and B (LHS) or the actual consequence execution of rules in A and B (RHS)? If it is LHS of the rules that is taking too long to execute, then you may try enabling the engine multi-thread evaluation option. If it is the consequence, unfortunately, the engine by itself can not solve the problem, because it does not know when/how the consequence code of your rules affect each other. This way, the engine executes all consequences in sequence, one after the other. If it is the later, one possible solution is to make your consequences trigger an asynchronous action instead of executing all the code in the same engine thread, when you know your code is independent among rules. We are working on enabling multiple agendas and different ways to execute consequences in the engine, but no idea at this moment when it will be ready. Edson 2009/8/13 Tobias Buchloh <t.buchloh(a)gmx.net&gt; -- Edson Tirelli JBoss Drools Core Development JBoss by Red Hat @ www.jboss.com