A constraint programming approach to the hospitals/residents problem

Manlove, D.F., O'Malley, G., Prosser, P. and Unsworth, C. (2007) A constraint programming approach to the hospitals/residents problem. In: Proceedings of CP-AI-OR '07: the Fourth International Conference on Integration of AI and OR Techniques in Constraint Programming for Combinatorial Optimization Problems, Brussels, Belgium, 23-26 May, 2007, pp. 155-170. (doi: 10.1007/978-3-540-72397-4_12)



Publisher's URL: http://dx.doi.org/10.1007/978-3-540-72397-4_12


An instance I of the Hospitals/Residents problem (HR) involves a set of residents (graduating medical students) and a set of hospitals, where each hospital has a given capacity. The residents have preferences for the hospitals, as do hospitals for residents. A solution of I is a <i>stable matching</i>, which is an assignment of residents to hospitals that respects the capacity conditions and preference lists in a precise way. In this paper we present constraint encodings for HR that give rise to important structural properties. We also present a computational study using both randomly-generated and real-world instances. We provide additional motivation for our models by indicating how side constraints can be added easily in order to solve hard variants of HR.

Item Type:Conference Proceedings
Keywords:Stable matching, constraint satisfaction problem, specialised constraints, arc consistency, GS-lists.
Glasgow Author(s) Enlighten ID:Manlove, Professor David and Unsworth, Dr Chris and Prosser, Dr Patrick and O'Malley, Dr Gregg
Authors: Manlove, D.F., O'Malley, G., Prosser, P., and Unsworth, C.
Subjects:Q Science > QA Mathematics > QA75 Electronic computers. Computer science
College/School:College of Science and Engineering > School of Computing Science
Research Group:Formal Analysis, Theory and Algorithms
Journal Name:Lecture Notes in Computer Science
Copyright Holders:Copyright © 2007 Springer
First Published:First published in the Lecture Notes in Computer Science 4510:155-170
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher.

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