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Citation

Ozcan E, Bykov Y, Birben M & Burke E (2009) Examination timetabling using late acceptance hyper-heuristics. In: 2009 IEEE Congress on Evolutionary Computation, CEC 2009. IEEE Congress on Evolutionary Computation, 2009. CEC '09, Trondheim, Norway, 18.05.2009-21.05.2009. Red Hook, NJ, USA: IEEE, pp. 997-1004. http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4983054; https://doi.org/10.1109/CEC.2009.4983054

Abstract
A hyperheuristic is a high level problem solving methodology that performs a search over the space generated by a set of low level heuristics. One of the hyperheuristic frameworks is based on a single point search containing two main stages: heuristic selection and move acceptance. Most of the existing move acceptance methods compare a new solution, generated after applying a heuristic, against a current solution in order to decide whether to reject it or replace the current one. Late acceptance strategy is presented as a promising local search methodology based on a novel move acceptance mechanism. This method performs a comparison between the new candidate solution and a previous solution that is generated L steps earlier. In this study, the performance of a set of hyper-heuristics utilising different heuristic selection methods combined with the late acceptance strategy are investigated over an examination timetabling problem. The results illustrate the potential of this approach as a hyperheuristic component. The hyper-heuristic formed by combining a random heuristic selection with late acceptance strategy improves on the best results obtained in a previous study.