Use Immovable filter (see docs chapter about continuous planning) to make sure the already planning entities don't move. See course scheduling and nurse rostering video's for 2 different approaches. You 'll want to load recent historical data because they affect constraints on the newly placed entities. See nurse rostering video. -- View this message in context: http://drools.46999.n3.nabble.com/How-to-do-continuous-planning-in-Optapl... Sent from the Drools: User forum mailing list archive at Nabble.com.