I'd like some advice on how to make my model. I need to plan employee schedule for a month, I have some constraint that will change dynamically by employee. Constraint are 1. NO_SUNDAY_NIGHT_SHIFT 2. NO_EVENING_SHIFT 3. ONLY_NIGHT_SHIFT I create domain classes just like nurse roistering and try to apply rule. My domain classes is ShiftAssignement --------------------------planningEntity class Employee-------------------------------------planningEntity variable Preference-----------------------------------Employee gives his shift preference (just like contract in nurse rostering ) BlackDays-----------------------------------Employee define his black day in preference(just like WeekEnd) ShiftLine-------------------------------------It is List of shiftline in preference (ShiftLineType is enum variable in which we define constraint NO_SUNDAY_NIGHT_SHIFT (its hard coded for test)) Shift------------------------------------------Just like nurse restring ShiftDate----------------------------------- Just like nurse restring ShiftType----------------------------------- Just like nurse restring I am unable to map constraint(NO_SUNDAY_NIGHT_SHIFT) for one month scheduling of employee Is above domain is correct? then how to write rule and other stuff……… -- View this message in context: http://drools.46999.n3.nabble.com/how-to-use-constraint-dynamically-in-ru... Sent from the Drools: Developer (committer) mailing list mailing list archive at Nabble.com.