Op 08-03-13 08:22, lbrito schreef: The DroolsScoreDirector (= the class that manages the score calculation based on DRL's) doesn't provide the Solution instance itself to the drl normally. Although you could implement your Solution.getProblemFacts() to include the Solution instance too. Either way, since all your ProblemFacts are available in the working memory of the DRL, you could create a high salience rule which does something like this: rule myInitRule salience 1000 when $s : Solution() $e : PlanningEntity() then modify ($e) { $e.setSomeProperty($s.calculateSomePropertyFor($e)); } end But you're probably much better off using an insertLogical(new SomePropertyForValueEntity()...)), as the nurseRosteringScoreRules.drl do a lot. Or, you could also look into the java ScoreDirector's (see manual), which give you total freedom at a very high maintenance cost (because you have to write the incremental score calculation delta algorithms yourself).