Hi, We have implemented a best score recaller to keep the n best found solutions. It seems to be ok except on very simple test cases : - On the first step, 4 moves are tested. They all return a feseable score. The best one is kept and sent to the solution recaller. - After each of these moves, no other moves are possible and the other solutions of the first step are not sent to the solution recaller. So, in our solution recaller, we have only one solution. Thanks for your help Michenux. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

Hi, This is a genuine test case. It is like this in our application because drools is not the final decision maker. Drools is here to find and propose the n best solutions, the customer will pick up one among these. The score of each solution is printed to the customer, so he knows that this one is best than the other one but he is not forced to choose it and can choose another one as well. We build the solver and we set the solution Recaller using setBestSolutionRecaller. I have looked at the examples and i don't see how to configure "at least n steps taken finish". Can u help ? Best regards Michenux -------- Message d'origine-------- De: rules-users-bounces(a)lists.jboss.org de la part de Geoffrey De Smet Date: jeu. 02/07/2009 20:43 À: rules-users(a)lists.jboss.org Objet : [rules-users] Re: the n best solutions on a very simple test case(drools-solver) Only the solution which is reached by each chosen step is send to the BestSolutionRecaller. If you do only one step, you 'd have to do some dirty hack to get those other 4. Maybe you can use your current Finish combined with AND and a at least 4 steps taken finish, to force at least (4 - 1 = )3 steps. Combine it with a completeSolutionTabu of at least 3 (usually I take a 1000) and you 'll have 4 distinct solutions. Your starting solution will also count as one. But I am interested in this use case :) 1) Why do you want to recall you best 4 solutions? Only the best solution seems relevant to me (but I could be wrong). If this is a genuine use case, I can add a MultiBestSolutionRecaller in the drools-solver code. 2) Extending a BestSolutionRecaller is easy, but how did you hook it up into the framework? a) Did you build your solver and then do a setBestSolutionRecaller() b) Or did you use xstream ability to configure in your BestSolutionRecaller implementation directly? BTW: other feed-back on how to improve drools-solver is welcome With kind regards, Geoffrey De Smet Laurent Michenaud schreef: > Hi, > > We have implemented a best score recaller to keep > the n best found solutions. > It seems to be ok except on very simple > test cases : > > - On the first step, 4 moves are tested. They all > return a feseable score. The best one is kept and > sent to the solution recaller. > - After each of these moves, no other moves are > possible and the other solutions of the first step > are not sent to the solution recaller. > > So, in our solution recaller, we have only one > solution. > > Thanks for your help > Michenux. > > > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ------------------------------------------------------------------------ _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users