[rules-users] Re: the n best solutions on a very simple test case(drools-solver)

[Geoffrey De Smet]

Try something like this:

<finish>
   <finishCompositionStyle>AND</finishCompositionStyle>
   <maximumStepCount>4</maximumStepCount>
   ... your current finish configuration ...
</finish>

With kind regards,
Geoffrey De Smet


Laurent Michenaud schreef:
> 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 at lists.jboss.org de la part de Geoffrey De Smet
> Date: jeu. 02/07/2009 20:43
> À: rules-users at 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 at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
> 
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
> 
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users