Hi All, 1. Is it a good idea to categorize rules, place each category of rules in a different drl file and load the different drls in a same knowledge base ? Approaches to loading of rules in the knowledge base: 1. Load different drl files in a single knowledge builder and add the package to a single knowledge base. 2. Load each drl file in a new knowlegeBuilder and then add the package to a single knowledge base. 3. Load different knowledge bases for different drl files. IMO, 1 is better. (Since none of the examples are using multiple drl files so I asked this question) 2. My drools usage is for rules that requires stateless sessions I was thinking of using Sequential Rete. ( http://blog.athico.com/2007/07/sequential-rete.html) Apart from the below two lines of code is there anything which should be taken care of ? KnowledgeBaseConfiguration kbaseConf = KnowledgeBaseFactory.newKnowledgeBaseConfiguration(); kbaseConf.setOption(SequentialOption.YES);// http://blog.athico.com/2007/07/sequential-rete.html // kbaseConf.setOption(MultithreadEvaluationOption.YES); 3. How to achieve Multi Threading in drools for stateless rules? Is there a way where I can use the inbuilt parallelism (if it supports) ? I found an option MultithreadEvaluationOption.YES in the knowledge base configuration. If any sample code or example for multi threaded usage of drools is available it would be of good help.. --Harshit