[rules-users] Rule to order by priority [Planner]

[André Fróes]

Thanks for the explanation, that helped me a lot.


2013/2/4 Geoffrey De Smet <ge0ffrey.spam at gmail.com>

>
>
> Op 04-02-13 14:24, André Fróes schreef:
>
> Hello there. I've been trying to create a rule to plan the my workorders
> with higher priority first, but I'm not bein able to.
>
> First read up on the difference between "score weight" and "score levels":
>
> http://docs.jboss.org/drools/release/5.5.0.Final/drools-planner-docs/html_single/index.html#d0e3333
> Does your business want to plan higher priority workitems always (= score
> level) or are there exceptions (= score weight)?
> Ask them this: if you can assign 1000000 low priority tasks or only 1 high
> priority task, what would you rather do?
>
>
>  I tried creating a rule something like
> "conflictingLecturesInSamePeriod", but I'm getting lost.
>
>  Example: I've implemented my previous example of engineer/workorders and
> added shitf and priority. The priorities goes from 1 to 5, the lowest it
> is, the more urgent it is (1-Highest, 2-High, etc..)
>
>  I don't know how to compare it to the other in the list, so I tried
> checking with previous ID, but no success:
> ******************************
>  rule "workOrderByPriority"
>  when
>  $leftWorkOrderPriority : WorkOrder($leftWOP : id, $leftPriority :
> priority.priorityID)
>  $righttWorkOrderPriority : WorkOrder(id >= $leftWOP, $rightPriority :
> priority.priorityID)
>   $engineer: Engineer($id : id)
>  then
>  insertLogical(new IntConstraintOccurrence("workOrderByPriority",
> ConstraintType.NEGATIVE_SOFT,
>  1,
>  <UNKNOWN>, $engineer));
>
> makes no sense to me, especially since 1) there are no restrictions on
> engineer and 2) because it's the cause
>
>   end
> *******************************
> this above is the second attempt, the <UNKNOWN> is because i'm lost about
> what to add and also if i should add something there.
>
>  the first try just pass straight forward
> *******************************
>  rule "workOrderByPriority"
>  when
>  $engineer : Engineer($worktime : worktime)
>  $priority : WorkOrder($priorityId : priority.priorityID)
>  then
>  insertLogical(new IntConstraintOccurrence("workOrderByPriority",
> ConstraintType.NEGATIVE_SOFT,
>  2,
>  $priority, $engineer));
> end
>  *******************************
>  i know i'm far from get even closer. In order to define the planner
> according to priority I think I should compare it with entire list isn't? I
> noticed that in some rules, and entire list is pointed.
>
>
> "Plan according to priority" is vague, here's are some suggestions on
> implementation:
>
> A)
> When
>   there's unassigned workorder
>   and there's an engineer capable of doing that workorder
>   and the engineer has a workorder with a lower priority (use "exists"
> here)
> then
>   the engineer should be doing the other workorder
>   -1 (with the cause being the unassigned workorder)
>
> B)
> When
>    there's an unassigned workorder
> then
>   -1 * priority * 1000 (with the cause being the unassigned workorder)
>
> HTH
>
>
>  I searched the guide and example for some tips, but the best I found was
> the course that compared 2 courses that I believe that will be the same
> thing i'll have to do with priorities.
>
>
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