[jboss-jira] [JBoss JIRA] (JBRULES-3555) Allow to specify a relative value for the entity tabu

[Lukáš Petrovický (JIRA)]

Lukáš Petrovický created JBRULES-3555:
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             Summary: Allow to specify a relative value for the entity tabu
                 Key: JBRULES-3555
                 URL: https://issues.jboss.org/browse/JBRULES-3555
             Project: Drools
          Issue Type: Feature Request
      Security Level: Public (Everyone can see)
          Components: drools-planner
    Affects Versions: 5.5.0.Beta1
            Reporter: Lukáš Petrovický
            Assignee: Geoffrey De Smet


Problems such as the RAS2012 challenge require us to provide a solution for problems of varying size - the number of entities in the various cases ranges from 3 to 30.

In this case, it is nearly impossible to benchmark all those problems at once using the planning entity tabu. When you specify a tabu size larger than the number of entities, no solutions are accepted and thus the benchmark is useless.

What I propose is to implement a planning entity tabu size that accepts the two different values:

- Negative number. That would mean that the tabu would be of size Math.max($totalNumberOfEntities - 1, $totalNumberOfEntities - $specifiedNumber);

- Percentage. That would mean that the tabu would be of the of Math.max($totalNumberOfEntities - 1, Math.round($percentage * $totalNumberOfEntities)).

This way, the planning entity tabu size will become universally usable.

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