6th ICAPS Workshop on Hierarchical Planning (HPlan 2023)

Prague, Czech Republic July 9-10, 2023

The workshop for Hierarchical Planning (HPlan) was founded in 2018 and is carried out since then every year at the International Conference of Automated Planning and Scheduling (ICAPS).

The motivation for using hierarchical planning formalisms is manifold. It ranges from an explicit and predefined guidance of the plan generation process and the ability to represent complex problem solving and behavior patterns to the option of having different abstraction layers when communicating with a human user or when planning co-operatively.

The best-known formalism in the field is Hierarchical Task Network (HTN) planning. In addition, there are several other hierarchical planning formalisms, e.g., hybrid planning (incorporating aspects from POCL planning), Hierarchical Goal Network (HGN) planning (incorporating a hierarchy on goals), or formalisms that combine task hierarchies with timeline planning (e.g. ANML).
Hierarchies induce fundamental differences from classical planning, creating distinct computational properties and requiring separate algorithms from non-hierarchical planners.

Many of these aspects of hierarchical planning are still unexplored. Thus, we encourage any contribution, independent of the underlying hierarchical planning formalism, and want to provide a forum for researchers to discuss the various aspects of hierarchical planning.

Among the Organizing Committee of this 2023 edition is Daniel Höller from Saarland University, member of the TUPLES project.

Global HPlan page https://hierarchical-task.net/hplan

Link to the 2023 HPlan https://icaps23.icaps-conference.org/program/workshops/hplan/