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 ($size = $totalNumberOfEntities - $specifiedNumber).

• Percentage. That would mean that the tabu would be ($size = Math.round($percentage * $totalNumberOfEntities)).

In both cases, 0 < $size < $totalNumberOfEntities. This way, the planning entity tabu size will become universally usable.