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

[Nadim]

ge0ffrey wrote
> Without a construction heuristic, local search waste a lot of time doing 
> easy work.
> No CH is like swimming 25 meter with LS.
> CH with LS is like jumping 10 meters into the pool and then swimming the 
> remaining 15.
> I've seen cases were it takes minutes for LS to make up for the work of
> CH.

Oh, I completely agree, that's how it's supposed to theoretically work. 
It's not that I'm not using a construction heuristic; I just can't seem to
make one actually function.  I've tried FIRST_FIT, FIRST_FIT_DECREASING,
BEST_FIT, and BEST_FIT_DECREASING.  In each case, it basically does
absolutely nothing.  With the localsearch turned off, and a construction
heuristic section of:

<constructionHeuristic>
   
<constructionHeuristicType>BEST_FIT_DECREASING</constructionHeuristicType>
</constructionHeuristic>

I get:

OptaPlanner solver test...
2014-03-05 11:54:46,431 [main] INFO  Solving started: time spend (11), score
(0hard/0soft), new best score (0hard/0soft), random seed (0).
2014-03-05 11:54:46,435 [main] TRACE     Created cachedEntityList with size
(100) in entitySelector(Sorting(FromSolutionEntitySelector(Item))).
2014-03-05 11:54:46,436 [main] TRACE     Sorted cachedEntityList with size
(100) in entitySelector(Sorting(FromSolutionEntitySelector(Item))).
2014-03-05 11:54:46,450 [main] INFO  Phase (0) constructionHeuristic ended:
step total (0), time spend (32), best score (0hard/0soft).
2014-03-05 11:54:46,450 [main] INFO  Solving ended: time spend (32), best
score (0hard/0soft), average calculate count per second (62).

Still trying to figure out why...



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