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I'm using the Nurse Rostering code as a base and adding my own rules, etc.
Are there any examples of "wanted" patterns? It looks like all the input
files, and the drl rules are all for "unwanted" patterns. I just want to
make sure I'm not missing something obvious.
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On 18-07-13 05:30, john poole wrote:
I'm using the Nurse Rostering code as a base and adding my own
rules, etc.
Are there any examples of "wanted" patterns? It looks like all the input
files, and the drl rules are all for "unwanted" patterns. I just want to
make sure I'm not missing something obvious.
Positive constraints (aka
"wanted" patterns) are fully supported in
OptaPlanner.
Just none of the example use them (IIRC).
Instead of doing this for an unwanted pattern:
scoreHolder.addSoftConstraintMatch(kcontext, -
$pattern.getWeight());
do this for a wanted pattern:
scoreHolder.addSoftConstraintMatch(kcontext, $pattern.getWeight());
Also, you probably want your solver configuration's
constructionHeuristic not use any pickEarly.
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Thanks. It was simple once I knew it was going to work. Writing rules is very
intuitive when I'm doing them daily, but if I take a couple of months off I
lose the touch.
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