[rules-users] Purpose of difficultyWeightFactoryClass in @PlanningEntity annotation.

Hi, I am struggling with the purpose of difficultyWeightFactoryClass in the @PlanningEntity annotation. I thought it was used to indicate which PlanningEntities to handle first in order to get faster to a solution. Though it seems that it also has impact on whether or not to get to a zero-hardscore solution. I mean I have a testcase that resolves to a zero-hardscore solution. Then I change something small in how the difficultyWeightFactoryClass calculates the weight and all the sudden I get a negative-hardscore solution. I thought it would still get to the same zero-hardscore solution but in a shorter solving time. My solver termination is as follows:     <termination>         <terminationCompositionStyle>OR</terminationCompositionStyle>         <maximumSecondsSpend>3600</maximumSecondsSpend>         <scoreAttained>0hard/0soft</scoreAttained>     </termination> and constructionHeuristic:     <constructionHeuristic>         <constructionHeuristicType>BEST_FIT_DECREASING</constructionHeuristicType>     </constructionHeuristic> I do not reach a zero-hardscore and the time spent is about 2.8 seconds... If I read the best solution I get: .isEveryProblemFactChangeProcessed(): true .isTerminateEarly(): false Any idea why I do not get a zero-hardscore solution anymore when only making a small change to the difficultyWeightFactoryClass logic? Thanks Michiel.   ----------------- http://www.codessentials.com - Your essential software, for free! Follow us at http://twitter.com/#!/Codessentials