Technical Report No. 126 - Abstract

Jana Koehler
RIFO within IPP

The paper describes the implementation of the RIFO family of heuristics to detect irrelevant operators and initial facts within the IPP planning system. It discusses the main differences to the original RIFO method that was developed by Bernhard Nebel for STRIPS operators. For IPP, this method was extended to handle conditional effects and negation. Furthermore, a metastrategy was added, which allows the planner to decide when to activate RIFO depending on the number of objects and ground operators in a planning problem. A summary of results from the 1998 planning competition shows the effectiveness of this strategy.