On 12-11-13 14:22, ns wrote: See the new docs section "fairness" of 6.0.0.Final (not yet released): https://github.com/droolsjbpm/optaplanner/blob/master/optaplanner-docs/sr... 2 ways (depending on your goals): - penalize multiple gaps in a row (using the squared trick as shown above) - count the number of assignments per week and penalize the square of it. HTH

I managed to create a rule to distribute the shiftassignments equally, using your fairness example. I am now however stuck on the part time, full time problem. A person that works part time (50%) should get assigned only half the shifts that a full time gets assigned. How do I do that? I have tried the following: rule "arbeidsbreuk" when $employee : Employee($arbeidsbreuk : arbeidsbreuk) //count aantal shifts $assignmentTotal : Number() from accumulate( $assignment : ShiftAssignment(), count($assignment) ) //count aantal shifts per medewerker $assignmentTotalEmployee : Number() from accumulate( $assignment : ShiftAssignment(employee == $employee), count($assignment) ) //count arbeidsbreuken $arbeidsbreukTotal : Number() from accumulate( Employee($breuk : arbeidsbreuk), count($breuk) ) $over : ($assignmentTotal.intValue() / $arbeidsbreukTotal.intValue()) - ($arbeidsbreuk.intValue() * $assignmentTotalEmployee.intValue()) then scoreHolder.addSoftConstraintMatch(kcontext, -$over.intValue() * $over.intValue()); end But I get the error: Message [id=1, level=ERROR, path=optaplanner-kie-namespace//be/ocmwturnhout/permanenties/solver/permanentiesScoreRules.drl, line=117, column=0 text=[ERR 102] Line 117:45 mismatched input '/' in rule "arbeidsbreuk"] Message [id=2, level=ERROR, path=optaplanner-kie-namespace//be/ocmwturnhout/permanenties/solver/permanentiesScoreRules.drl, line=0, column=0 text=Parser returned a null Package] I have also tried another rule in which I had a double in the scoreHolder.addSoftConstraintMatch function and I tried to convert it to an integer using intValue() . This however also gave an error. Is there a way to convert doubles to integers? -- View this message in context: http://drools.46999.n3.nabble.com/Equal-shift-assignment-based-on-employm... Sent from the Drools: User forum mailing list archive at Nabble.com.