{"type":"ScholarlyArticle","title":"Applying Max-Sum to Asymmetric Distributed Constraint Optimization","authors":[{"name":"Roie Zivan","slug":"roie-zivan","given":"Roie","family":"Zivan","affiliation":""},{"name":"Tomer Parash","slug":"tomer-parash","given":"Tomer","family":"Parash","affiliation":""},{"name":"Yarden Naveh","slug":"yarden-naveh","given":"Yarden","family":"Naveh","affiliation":""}],"abstract":"We study the adjustment and use of the Max-sumalgorithm for solving Asymmetric Distributed ConstraintOptimization Problems (ADCOPs). First, we formalize asymmetric factor-graphs and apply the different versions of Max-sum to them. Apparently, in contrast to local search algorithms, most Max-sum versions perform similarly when solving symmetric and asymmetric problems and some even perform better on asymmetric problems. Second, we prove that the convergence properties of Max-sum ADVP (an algorithm that was previously found to outperform other Max-sum versions) and the quality of the solutions it produces are dependent on the order between nodes involved in each constraint, i.e., the inner constraint order (ICO). A standard ICO allows to reproduce the properties achieved for symmetric problems, and outperform previously proposed local search ADCOP algorithms. Third, we demonstrate that a non-standard ICO can be used to balance exploration and exploitation, resulting in the best performing Max-sum version on both symmetric and asymmetric standard benchmarks.","doi":null,"url":"https://ijcai.org/proceedings/2015/67","pdf":"https://ijcai.org/proceedings/2015/0067.pdf","markdown":"https://ijcai.org/proceedings/2015/67.md","bibtex":"https://ijcai.org/proceedings/2015/bibtex/67","volume":{"slug":"2015","title":"Proceedings of the Twenty-Fourth International Joint Conference on Artificial Intelligence","short_title":"IJCAI 2015","url":"https://ijcai.org/proceedings/2015/","year":2015,"location":"Buenos Aires, Argentina","dates":"25–31 July 2015","editors":"Qiang Yang and Michael Wooldridge","isbn":"978-1-57735-738-4","publisher":"International Joint Conferences on Artificial Intelligence","doi_prefix":""},"section":"Distributed Search/CSP/Optimization","track":"Main Track","number":67,"pages":{"first":432,"last":438},"keywords":[],"videos":[],"references":[],"license_note":"Copyright International Joint Conferences on Artificial Intelligence."}