spinjala wrote Well, it's a slightly different problem them. Planner's approach is to solve problems in parallel, where it's not trivial to determine where a given item can be matched. Part of the motivation beyond using Planner is that whether one item fits may be dependent on how the other items are arranged. If workorders are coming in one at a time, why not apply the rules to that item alone -- and that remove it from the planning scenario if it can't be fit? Jon -- View this message in context: http://drools.46999.n3.nabble.com/modifying-the-problem-facts-while-runni... Sent from the Drools: User forum mailing list archive at Nabble.com.