{"type":"ScholarlyArticle","title":"Rational Deployment of CSP Heuristics","authors":[{"name":"David Tolpin","slug":"david-tolpin","given":"David","family":"Tolpin","affiliation":""},{"name":"Solomon Eyal Shimony","slug":"solomon-eyal-shimony","given":"Solomon Eyal","family":"Shimony","affiliation":""}],"abstract":"Heuristics are crucial tools in decreasing search effort in varied fields of AI. In order to be effective, a heuristic must be efficient to compute, as well as provide useful information to the search algorithm. However, some well-known heuristics which do well in reducing backtracking are so heavy that the gain of deploying them in a search algorithm might be outweighed by their overhead. We propose a rational metareasoning approach to decide when to deploy heuristics, using CSP backtracking search as a case study. In particular, a value of information approach is taken to adaptive deployment of solution-count estimation heuristics for value ordering. Empirical results show that indeed the proposed mechanism successfully balances the tradeoff between decreasing backtracking and heuristic computational overhead, resulting in a significant overall search time reduction.","doi":"10.5591/978-1-57735-516-8/IJCAI11-120","url":"https://ijcai.org/proceedings/2011/120","pdf":"https://ijcai.org/proceedings/2011/0120.pdf","markdown":"https://ijcai.org/proceedings/2011/120.md","bibtex":"https://ijcai.org/proceedings/2011/bibtex/120","volume":{"slug":"2011","title":"Proceedings of the Twenty-Second International Joint Conference on Artificial Intelligence","short_title":"IJCAI 2011","url":"https://ijcai.org/proceedings/2011/","year":2011,"location":"Barcelona, Catalonia, Spain","dates":"16–22 July 2011","editors":"Toby Walsh","isbn":"978-1-57735-512-0; 978-1-57735-513-7; 978-1-57735-514-4; 978-1-57735-515-1; 978-1-57735-516-8","publisher":"AAAI Press/International Joint Conferences on Artificial Intelligence","doi_prefix":""},"section":null,"track":"","number":120,"pages":{"first":680,"last":685},"keywords":[],"videos":[],"references":[],"license_note":"Copyright International Joint Conferences on Artificial Intelligence."}