[jboss-jira] [JBoss JIRA] Issue Comment Edited: (JBRULES-2911) Planner: simulated annealing should work for planning problems with hard constraints often broken too

[Geoffrey De Smet (JIRA)]

    [ https://issues.jboss.org/browse/JBRULES-2911?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12585113#comment-12585113 ] 

Geoffrey De Smet edited comment on JBRULES-2911 at 3/1/11 2:37 AM:
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Fixed, from the upgrade recipe:

Simulated annealing now supports working with hard constraints too (JBRULES-2911)
The starting temperature (usually close the maximum score delta) is now a Score instead of a double.
Before in *Config.xml:
    <simulatedAnnealingStartingTemperature>20.0</simulatedAnnealingStartingTemperature>
After in *Config.xml (if you're using HardAndSoftScore):
    <simulatedAnnealingStartingTemperature>0hard/20soft</simulatedAnnealingStartingTemperature>
After in *Config.xml (if you're using SimpleScore):
    <simulatedAnnealingStartingTemperature>20</simulatedAnnealingStartingTemperature>

      was (Author: ge0ffrey):
    fixed, see reference manual and Upgrade recipe txt
  
> Planner: simulated annealing should work for planning problems with hard constraints often broken too
> -----------------------------------------------------------------------------------------------------
>
>                 Key: JBRULES-2911
>                 URL: https://issues.jboss.org/browse/JBRULES-2911
>             Project: Drools
>          Issue Type: Enhancement
>      Security Level: Public(Everyone can see) 
>          Components: drools-planner
>            Reporter: Geoffrey De Smet
>            Assignee: Geoffrey De Smet
>            Priority: Minor
>             Fix For: 5.2.0.M2
>
>
> This code is bad in SimulatedAnnealingAcceptor:
>         // TODO don't abuse translateScoreToGraphValue
>         // TODO do hard and soft separately and then average their acceptChance
>         Double diff = localSearchSolverScope.getScoreDefinition().translateScoreToGraphValue(scoreDifference);
>         if (diff == null) {
>             // more hard constraints broken, ignore it for now
>             return 0.0;
>         }

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