[rules-users] [planner] Re: Planner/solver - POSITIVE scoring...

[Geoffrey De Smet]

I am thinking the same thing. Flow and guvnor questions also come 
through this list.

I 'll ask in the planner manual to put [planner] in front of your subject :)
PS: I 'll also make a twitter hash tag: #drools-planner

By the way, Micheal did you see my reply on this thread too, about the 
global Score refactor?

With kind regards,
Geoffrey De Smet


Swindells, Thomas schreef:
> I'd vote to keep it on here, the traffic isn't that high and people like me can learn about what other features exist.  Plus it makes searching for answers so much easier.
> 
> Thomas
> 
>> -----Original Message-----
>> From: rules-users-bounces at lists.jboss.org [mailto:rules-users-
>> bounces at lists.jboss.org] On Behalf Of Michael Neale
>> Sent: 08 January 2010 01:21
>> To: Rules Users List
>> Subject: Re: [rules-users] Planner/solver - POSITIVE scoring...
>>
>> yeah that is it.
>>
>> BTW - is it ok to chat about planner here - is there enough interest
>> to create a separate list for it if needed? (or is traffic low enough
>> people aren't troubled?).
>>
>> On Fri, Jan 8, 2010 at 3:11 AM, Greg Barton <greg_barton at yahoo.com> wrote:
>>> So, basically what you're saying is, "The impact of a given negative soft
>> constraint is reduced by the occurrence of another positive constraint."
>>> If that's the case, the rule makes sense to me: total up the occurrences of
>> the negative constraint, total up the occurrences of the positive constraint,
>> and then combine them in a way that describes their relationship.
>>> In this case, what the positive constraint "favors" is the reduction or
>> elimination of the negative constraint, so subtracting the positive constraint
>> makes sense. (A classic "interference pattern" situation.)
>>> --- On Thu, 1/7/10, Michael Neale <michael.neale at gmail.com> wrote:
>>>
>>>> From: Michael Neale <michael.neale at gmail.com>
>>>> Subject: [rules-users] Planner/solver - POSITIVE scoring...
>>>> To: "Rules Users List" <rules-users at lists.jboss.org>, "Geoffrey"
>> <ge0ffrey.spam at gmail.com>
>>>> Date: Thursday, January 7, 2010, 12:23 AM
>>>> Hi All - FYI I have been conversing
>>>> with Geoffrey on basic
>>>> solver/planner usage questions, but we are bring the
>>>> discussion here
>>>> in case others can benefit.
>>>>
>>>> So I am looking at using IntConstraintOccurrence, for
>>>> scoring with
>>>> weights, and HardAndSoftConstraintScoreCalculator. So I can
>>>> see how
>>>> NEGATIVE_HARD and NEGATIVE_SOFT scores would work, with
>>>> appropriate
>>>> accumulator rules doing that etc.
>>>>
>>>> What I am not sure about is ConstraintType.POSITIVE - so I
>>>> want to use
>>>> that to "favour" certain aspects of a solution. So would
>>>> the correct
>>>> way to use that to be to have rules that use a positive
>>>> IntConstrainOccurrence, and then do something like:
>>>>
>>>>     when
>>>>         $softTotal : Number() from
>>>> accumulate(
>>>>
>>>> IntConstraintOccurrence(constraintType ==
>>>> ConstraintType.NEGATIVE_SOFT, $weight : weight),
>>>>             sum($weight) //
>>>> Vote for
>>>> http://jira.jboss.com/jira/browse/JBRULES-1075
>>>>         );
>>>>        $positiveTotal: Number()
>>>> from accumulate(
>>>>
>>>> IntConstraintOccurrence(constraintType ==
>>>> ConstraintType.POSITIVE, $weight : weight),
>>>>             sum($weight) //
>>>> Vote for
>>>> http://jira.jboss.com/jira/browse/JBRULES-1075
>>>>         );
>>>>
>>>>     then
>>>>
>>>> scoreCalculator.setSoftConstraintsBroken($softTotal.intValue()
>>>> - $positiveTotal.intValue());
>>>>
>>>>
>>>>
>>>> ?? it seems odd - I want to use POSITIVE but I am using it
>>>> to reduce
>>>> the soft constraints broken? The the higher the positive
>>>> score, the
>>>> less softConstraintsBroken property of the score calculator
>>>> is set -
>>>> that seems odd... or should I not use HardAndSoft if I am
>>>> using
>>>> POSITIVE and NEGATIVE scoring?
>>>>
>>>>
>>>> --
>>>> Michael D Neale
>>>> home: www.michaelneale.net
>>>> blog: michaelneale.blogspot.com
>>>> _______________________________________________
>>>> 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
>>>
>>
>>
>> --
>> Michael D Neale
>> home: www.michaelneale.net
>> blog: michaelneale.blogspot.com
>>
>> _______________________________________________
>> rules-users mailing list
>> rules-users at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
> 
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