The International Planning Competition (IPC) is held every
few years in the context of ICAPS. It empirically evaluates
state-of-the-art planning systems on a number of benchmark
problems. The goals of the IPC are to promote planning
research, highlight challenges in the planning community and
provide new and interesting problems as benchmarks for
future research. The IPC has an important role in the ICAPS
community, being a forum to compare different algorithmic
ideas and implementations, and setting standards for
research and evaluation in the area.
Similar to the lineage of IPC workshops organised at ICAPS
2003, 2007, 2012, 2015, and 2019 this workshop aims to
review the current status of the IPC, analyse the results of
the last IPC (2020), and provide a venue for discussing
aspects that will be helpful for preparing forthcoming
Topics include, but need not be limited to:
- Past, present and future of the IPC
Tracks: Proposing new and/or revising the current tracks
Domain Definition Languages: benefits and limitations.
Should larger subsets of PDDL/RDDL/HDDL be considered in
next editions of the IPC? Should the input languages
evolve in some way?
Benchmark Domains: Discussion/Analysis of existing
domains. Are IPC benchmarks a good standard for evaluation
of planners? How should instances be chosen for the
competition? Should there be randomly generated instances?
Evaluation Metrics: Should we adapt the metrics used for
evaluating the performance of planners? How should the
winners of the competition be decided (e.g. analysis of
advantages and disadvantages of IPC 2018 & 2020 vs.
SPARKLE Planning challenge 2019)?
Results: interpretation of past results, new ideas about
how to analyze/compare the performance of planners beyond
the score of the competition.
Rules: Should portfolios be given a special treatment?
Should there be any limits on re-using code from others?
Tools: Can we automate large parts of the IPC to make
organising an IPC track easier?
We encourage submissions in three formats. All submissions
should be accompanied by a paper in AAAI style (the author
kit is available at
). In all tracks you can choose the length of your
submission freely between 1-8 pages + one page for
references. Please choose a length appropriate for the
format of your submission.
long presentations have a 30 minute slot, including
discussions. We expect most papers for this format will
make use of all 8 pages.
short presentations have a 15 minute slot, including
discussions. We expect the average paper in this format
will have around 4 pages.
super-short presentations have a 5 minute slot, including
discussion. We expect submissions to consist of an idea
that can be presented on 1-2 slides but lead to some
discussion, like a suggestion for a new track or metric.
Submissions in this track should consist of a title and
abstract, so no PDF submission is required (though it is
As suggested by the list of topics, we encourage the
submission of position papers as well as other submissions
that do not fit the mold of a typical conference paper.
The review process will be double blind. Submissions must be
made via easychair (https://easychair.org/conferences/?conf=wipc2021)
Deadlines and Dates
- Paper Submission: June 13
- Notification of acceptance/rejection: July 12
- Camera-ready paper submissions: August 1
- HPlan Workshop: Wednesday, 4 August, 2021 (2 hours), see ICAPS schedule (day 3) for time zone selection! Some selected time zones:
- 3 am to 5 am in parts of USA (EST)
- 4 am to 6 am in e.g., Brasilia, Brazil (BRT)
- 7 am to 9 am at virtual ICAPS (GMT)
- 9 am to 11 am in e.g., Germany (MEST)
- 5 pm to 7 pm in e.g., Canberra, Sydney, Melbourne (AEST)
- Online Policy Improvement for Probabilistic Planning: Benchmarks and Baselines
by Murugeswari Issakkimuthu and Alan Fern
- Designing an Adaptable Benchmark and Competition Simulation for Integrated Planning and Execution
by Liudvikas Nemiro, Gerard Canal, Oscar Lima, Michael Cashmore, and Mak Roberts
The workshop proceedings are available
7:00-9:00 GMT, Plenum Session:
- 7:00-7:15: Recap of IPC 2020 on Hierarchical Planning
- 7:15-7:30: IPC 2020 Planner Presentation: HyperTensioN (slides)
- 7:30-7:45: IPC 2020 Planner Presentation: Lilotane (slides)
- 7:45-8:00: IPC 2020 Planner Presentation: pyHiPOP (slides)
- 8:00-8:25: Online Policy Improvement for Probabilistic Planning: Benchmarks and Baselines (slides)
- 8:25-8:45: Designing an Adaptable Benchmark and Competition Simulation for Integrated Planning and Execution(slides)
- 8:45-9:00: An ELO System for Skat and other Games of Chance(slides)
- Gregor Behnke (University of Freiburg)
- Daniel Höller (Saarland University)
- Pascal Bercher (The Australian National University)