Sequential Optimization track

This track covers classical STRIPS planning (non-durative actions) with actions having associated non-negative costs (not necessarily uniform). Planners participating in this track are expected to find optimal plans in terms of total cost, where the total cost of each plan is defined as the sum of the costs of its actions. Planners compete on the number of problems they manage to solve within a reasonable amount of time.

• Core features: STRIPS, action costs

• Optional features: ADL, derived predicates
• Objective function: Minimize total cost

Core features are those that will appear in most of the domains. So, in order for a planner to have good chances to win this track of the competition, all the core features must be supported. However, there will exist some domains that do not require all the core features. A clustering of the domains of this track, together with the fraction of each class in the track, is provided below. The performance of all planners will be assessed in all domains they can run (the details of the evaluation schema will be announced on January 31st).

Optional features concern alternative but equivalent versions of each domain. These features will be used only in cases where they facilitate domain modelling. When several alternative versions of a domain are supported by a planner, it is scored on the version on which it performs best.

Classes of domains for the Sequential Optimization track

• STRIPS, action costs (fraction: about 2/3)
• STRIPS, uniform action costs (fraction: about 1/3)