[rules-users] OptaPlanner - best strategy for variable number of planning entities?

[Geoffrey De Smet]

On 06-03-14 03:23, Nadim wrote:
> I solved the construction heuristic problem.  Someone it didn't dawn on me
> right away that primitive types don't work properly as planning variables,
> because they're always initialized, thus the construction heuristic quits
> right away, thinking there's nothing to do.
Good point.
OptaPlanner shouldn't surprise you like that, I 've created an issue:
   https://issues.jboss.org/browse/PLANNER-227
>
> However, construction heuristic or no, it looks like it's getting stuck on
> local optima most of the time even in brain-dead simple cases (e.g. adding a
> constraint to force exactly one window).  Not sure if I may need to add some
> custom move logic to account for the fact that there are many Boolean
> planning variables (one for each potential session to attend), but that most
> of the potential toggles don't make much sense (generally you'd want to
> either tweak the sessions on the edges of existing windows, or try killing a
> window and growing a different one elsewhere.
to kill an entire window, it probably makes sense to have 
PillarChangeMove's (which aren't implemented yet, only PillarSwapMoves 
are currently available, see docs).
>
>
>
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