Landmarks Revisited

@inproceedings{Richter2008LandmarksR,
  title={Landmarks Revisited},
  author={Silvia Richter and M. Helmert and M. Westphal},
  booktitle={AAAI},
  year={2008}
}
Landmarks for propositional planning tasks are variable assignments that must occur at some point in every solution plan. We propose a novel approach for using landmarks in planning by deriving a pseudo-heuristic and combining it with other heuristics in a search framework. The incorporation of landmark information is shown to improve success rates and solution qualities of a heuristic planner. We furthermore show how additional landmarks and orderings can be found using the information present… Expand
Admissible heuristic with multi-landmarks counting
  • L. Li, L. Weisheng
  • Computer Science
  • 2011 6th IEEE Joint International Information Technology and Artificial Intelligence Conference
  • 2011
TLDR
An multi-path dependent heuristic which restricts the fact landmarks to be achieved from the current state during the search with considering the repeatedly appearance of action landmarks is proposed and proved theoretically admissible and empirically efficient. Expand
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TLDR
This work proposes a methodology for deriving admissible heuristic estimates for cost-optimal planning from a set of planning landmarks, and presents a simple best-first search procedure exploiting such heuristics. Expand
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LAMA is a propositional planning system based on heuristic search. Its core feature is the use of a pseudo-heuristic derived from landmarks, propositions that must be true in every solution of aExpand
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Landmarks are facts that must hold true at some point in all solutions to a planning problem. The exploitation of landmarks and associated ordering constraints has been shown to be very effective inExpand
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Using intermediate goals to guide the search or decompose a problem into smaller instances has proved to be a successful approach in Automated Planning. Goal subsets and more recently landmarks haveExpand
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TLDR
Two novel heuristics for costoptimal planning are proposed that consider cyclic dependencies between landmarks in addition to the cost for achieving all landmarks. Expand
Enhancing SAT Based Planning with Landmark Knowledge
TLDR
It turns out that landmark knowledge can be beneficial, but performance highly depends on the planning domain and the planning problem itself. Expand
Exploiting Landmarks for Hybrid Planning 1
Very recently, the well-known concept of landmarks has been adapted from the classical planning setting to hierarchical planning. It was shown how a pre-processing step that extracts local landmarksExpand
The LAMA Planner: Guiding Cost-Based Anytime Planning with Landmarks
TLDR
It is found that using landmarks improves performance, whereas the incorporation of action costs into the heuristic estimators proves not to be beneficial, and in some domains a search that ignores cost solves far more problems, raising the question of how to deal with action costs more effectively in the future. Expand
On the Use of Temporal Landmarks for Planning with Deadlines
TLDR
The experimental results will show that this approach is helpful to quickly detect unsolvable problems and it is also very effective to solve problems with deadlines in comparison to other state-of-the-art planners. Expand
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TLDR
This work defines ordering constraints not only over the top level goals, but also over the sub-goals that will arise during planning, and demonstrates that the approach can yield significant performance improvements in both heuristic forward search and Graphplan-style planning. Expand
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TLDR
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We introduce an efficient method for translating planning tasks specified in the standard PDDL formalism into a concise grounded representation that uses finite-domain state variables instead of theExpand
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