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<p>generally are ways more, e.g., cost-effective, quick, and safe.</p>

<p>Preference-based planners take these preferences into account when producing a plan for a given problem. Examples of preference-based planning software include PPLAN and HTNPlan-P (preference-based <a href="page.php?w=hierarchical_task_network">hierarchical task network</a> (HTN) planning).</p>

<p><big> Overview </big></p>
<p>Preferences can be regarded as soft constraints on a plan. The quality of a plan increases when more preferences are satisfied but it may not be possible to</p><p>
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