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Progress control in iterated local search for nurse rostering / Burke, E. K. in Journal of the operational research society (JORS), Vol. 62 N° 2 Special issue (Fevrier 2011) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 62 N° 2 Special issue (Fevrier 2011) . - pp. 360–367 Titre : Progress control in iterated local search for nurse rostering Type de document : texte imprimé Auteurs : Burke, E. K., Auteur ; Curtois, T., Auteur ; van Draat, L. F., Auteur Année de publication : 2011 Article en page(s) : pp. 360–367 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Local  search  Iterated  local  search  Nurse  rostering Index. décimale : 001.424 Résumé : This paper describes an approach in which a local search technique is alternated with a process which ‘jumps’ to another point in the search space. After each ‘jump’ a (time-intensive) local search is used to obtain a new local optimum. The focus of the paper is in monitoring the progress of this technique on a set of real world nurse rostering problems. We propose a model for estimating the quality of this new local optimum. We can then decide whether to end the local search based on the predicted quality. The fact that we avoid searching these bad neighbourhoods enables us to reach better solutions in the same amount of time. We evaluate the approach on five highly constrained problems in nurse rostering. These problems represent complex and challenging real world rostering situations and the approach described here has been developed during a commercial implementation project by ORTEC bv. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n2/abs/jors201086a.html [article] Progress control in iterated local search for nurse rostering [texte imprimé] / Burke, E. K., Auteur ; Curtois, T., Auteur ; van Draat, L. F., Auteur . - 2011 . - pp. 360–367. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 62 N° 2 Special issue (Fevrier 2011) . - pp. 360–367 Mots-clés : Local  search  Iterated  local  search  Nurse  rostering Index. décimale : 001.424 Résumé : This paper describes an approach in which a local search technique is alternated with a process which ‘jumps’ to another point in the search space. After each ‘jump’ a (time-intensive) local search is used to obtain a new local optimum. The focus of the paper is in monitoring the progress of this technique on a set of real world nurse rostering problems. We propose a model for estimating the quality of this new local optimum. We can then decide whether to end the local search based on the predicted quality. The fact that we avoid searching these bad neighbourhoods enables us to reach better solutions in the same amount of time. We evaluate the approach on five highly constrained problems in nurse rostering. These problems represent complex and challenging real world rostering situations and the approach described here has been developed during a commercial implementation project by ORTEC bv. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n2/abs/jors201086a.html