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

Julie Porteous, Laura Sebastia, Jorg Hoffmann

Research output: Contribution to conferencePaper

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.

Conference

Conference6th European Conference on Planning
Abbreviated titleECP 2001
CountrySpain
CityToledo
Period12/09/0114/07/16

Fingerprint

Planning

Keywords

  • landmarks
  • planning
  • ordering constraints

Cite this

Porteous, J., Sebastia, L., & Hoffmann, J. (2001). On the extraction, ordering, and usage of landmarks in planning. Paper presented at 6th European Conference on Planning, Toledo, Spain.
Porteous, Julie ; Sebastia, Laura ; Hoffmann, Jorg. / On the extraction, ordering, and usage of landmarks in planning. Paper presented at 6th European Conference on Planning, Toledo, Spain.
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note = "Requires Template change to Chapter in Book/Report/Conference proceeding › Conference contribution: Proceedings of the 6th European Conference on Planning (ECP 01); 6th European Conference on Planning, ECP 2001 ; Conference date: 12-09-2001 Through 14-07-2016",
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Porteous, J, Sebastia, L & Hoffmann, J 2001, 'On the extraction, ordering, and usage of landmarks in planning' Paper presented at 6th European Conference on Planning, Toledo, Spain, 12/09/01 - 14/07/16, .

On the extraction, ordering, and usage of landmarks in planning. / Porteous, Julie; Sebastia, Laura; Hoffmann, Jorg.

2001. Paper presented at 6th European Conference on Planning, Toledo, Spain.

Research output: Contribution to conferencePaper

TY - CONF

T1 - On the extraction, ordering, and usage of landmarks in planning

AU - Porteous, Julie

AU - Sebastia, Laura

AU - Hoffmann, Jorg

N1 - Requires Template change to Chapter in Book/Report/Conference proceeding › Conference contribution: Proceedings of the 6th European Conference on Planning (ECP 01)

PY - 2001

Y1 - 2001

N2 - 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.

AB - 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.

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KW - planning

KW - ordering constraints

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M3 - Paper

ER -

Porteous J, Sebastia L, Hoffmann J. On the extraction, ordering, and usage of landmarks in planning. 2001. Paper presented at 6th European Conference on Planning, Toledo, Spain.