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On the extraction, ordering, and usage of landmarks in planning

Porteous, Julie and Sebastia, Laura and Hoffmann, Jorg (2001) On the extraction, ordering, and usage of landmarks in planning. In: 6th European Conference on Planning, 2001-09-19, Toledo.

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    Abstract

    Many known planning tasks have inherent constraints concerning the best order in which to achieve the goals. A number of research efforts have been made to detect such constraints and use them for guiding search, in the hope to speed up the planning process. We go beyond the previous approaches by dening ordering constraints not only over the (top level) goals, but also over the sub-goals that will arise during planning. Landmarks are facts that must be true at some point in every valid solution plan. We show how such landmarks can be found, how their inherent ordering constraints can be approximated, and how this information can be used to decompose a given planning task into severa smaller sub-tasks. Our methodology is completely domain- and planner-independent. The implementation demonstrates that the approach can yield significant performance improvements in both heuristic forward search and GRAPHPLAN-style planning.

    Item type: Conference or Workshop Item (Paper)
    ID code: 1874
    Notes: Requires Template change to Chapter in Book/Report/Conference proceeding › Conference contribution: Proceedings of the 6th European Conference on Planning (ECP 01)
    Keywords: landmarks, planning, ordering constraints, Electronic computers. Computer science
    Subjects: Science > Mathematics > Electronic computers. Computer science
    Department: Faculty of Science > Computer and Information Sciences
    Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 05 Oct 2006
    Last modified: 18 Jul 2013 04:35
    URI: http://strathprints.strath.ac.uk/id/eprint/1874

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