Global variables in DRL's in Planner are an open discussion, feel free to add your viewpoints: https://issues.jboss.org/browse/JBRULES-2700 Originally, I figured the SolverFactory.setRuleBase() (will we be refactored to setKnowledgeBase() or setKieBase()) would be sufficient to expose all of drools's capabilities to the user's (and basically do whatever they want), but globals are set per KnowledgeSession (AKA WorkingMemory), so that doesn't allow the user access. And Planner might use multiple KnowledgeSession's, especially in genetic algorithms or multi-threaded solving. If you want to investigate the code yourself: Each KnowledgeSession is wrapped by a DroolsScoreDirector which is created by the DroolsScoreDirectorFactory. So let me reverse the question: How would want Planner to expose setGlobal functionality, knowing that it might use multiple KnowledgeSession for 1 Solver (one per solving thread)? Op 02-01-13 14:48, jonathan.labin schreef: