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Narrowing the Gap Between Saturated and Optimal Cost Partitioning for Classical Planning

AAAI 2017 · Learning theory and algorithms › Combinatorial and search optimization · approach: Classical and HTN planning · 15 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
optimize the abstraction order by hill climbing instead of a random orderSCP · IPC 1998-2014 optimal planning (1667 tasks)coverage: 759.3 -> 884.9Helped
hill-climbed order instead of the h-add ordersSCP · IPC 1998-2014 optimal planning (1667 tasks)coverage: 800 -> 884.9Helped
maximize over 200 random orders instead of a single random order (ablation)SCP · IPC 1998-2014 optimal planning (1667 tasks)coverage: 759.3 -> 947.0Helped
increase random orders beyond 200 (to 1000) (ablation)SCP max over random orders · IPC 1998-2014 optimal planning (1667 tasks)coverage: 947.0 -> 879.5Hurt
use multiple hill-climbed orders instead of random orders (ablation)SCP max over orders · IPC 1998-2014 optimal planning (1667 tasks)coverageNo clear effect
keep only orders that add information on sample states (diversification) instead of 200 random orders (ablation)SCP · IPC 1998-2014 optimal planning (1667 tasks)coverage: 947.0 -> 966.7Helped
increase diversification time from 0.1s to 200s (ablation)SCP div · IPC 1998-2014 optimal planning (1667 tasks)coverage: 928.3 -> 966.7Helped
increase diversification time beyond 200s to 1200s (ablation)SCP div · IPC 1998-2014 optimal planning (1667 tasks)coverage: 966.7 -> 956.3Hurt
SCP div instead of the strongest other admissible heuristic (hSEQ+LM-cut)optimal planning heuristics · IPC 1998-2014 optimal planning (1667 tasks)coverage: 895 -> 966.7Helped
SCP div instead of optimal cost partitioning under 30 min / 2GiB vs 24h / 3.5GiBcost partitioning · IPC 1998-2014 optimal planning (1667 tasks)coverage: 531 -> 966.7Helped
SCP div with h2 mutex pruning instead of SymBA*2optimal planning · IPC 1998-2014 optimal planning (1667 tasks)coverage: 1008 -> 1017.4No clear effect

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