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:

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.

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