An Estimation of Distribution Algorithm with Intelligent Local Search for Rule-based Nurse Rostering

Aickelin, Uwe and Burke, Edmund and Li, Jingpeng (2007) An Estimation of Distribution Algorithm with Intelligent Local Search for Rule-based Nurse Rostering. Journal of the Operational Research Society . (In Press)

WarningThere is a more recent version of this item available.

[img]
Preview
PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
328Kb

Official URL: http://www.palgrave-journals.com/jors/index.html

Abstract

This paper proposes a new memetic evolutionary algorithm to achieve explicit learning in rule-based nurse rostering, which involves applying a set of heuristic rules for each nurse's assignment. The main framework of the algorithm is an estimation of distribution algorithm, in which an ant-miner methodology improves the individual solutions produced in each generation. Unlike our previous work (where learning is implicit), the learning in the memetic estimation of distribution algorithm is explicit, i.e. we are able to identify building blocks directly. The overall approach learns by building a probabilistic model, i.e. an estimation of the probability distribution of individual nurse-rule pairs that are used to construct schedules. The local search processor (i.e. the ant-miner) reinforces nurse-rule pairs that receive higher rewards. A challenging real world nurse rostering problem is used as the test problem. Computational results show that the proposed approach outperforms most existing approaches. It is suggested that the learning methodologies suggested in this paper may be applied to other scheduling problems where schedules are built systematically according to specific rules.

Item Type:Article
Additional Information:"This is a post-peer-review, pre-copyedit version of an article published in Journal of the Operational Research Society. The definitive publisher-authenticated version Aickelin, Uwe and Burke, Edmund and Li, Jingpeng (2007) An Estimation of Distribution Algorithm with Intelligent Local Search for Rule-based Nurse Rostering. Journal of the Operational Research Society is available online at the offical URL above.
Uncontrolled Keywords:Nurse Rostering, Estimation of Distribution Algorithm, Local Search, Ant Colony Optimization
Schools/Departments:Faculty of Science > School of Computer Science and Information Technology
ID Code:561
Deposited By:Aickelin, Professor Uwe
Deposited On:02 Oct 2007
Last Modified:30 Oct 2007 15:22

Available Versions of this Item

Repository Staff Only: item control page