Dépouillements

Management science methodologies in environmental management and sustainability / Paucar-Caceres, A. in Journal of the operational research society (JORS), Vol. 62 N° 9 (Septembre 2011)

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1601-1620 Titre : Management science methodologies in environmental management and sustainability : discourses and applications Type de document : texte imprimé Auteurs : Paucar-Caceres, A., Auteur ; Espinosa, A., Auteur Année de publication : 2011 Article en page(s) : pp. 1601-1620 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Management  sciences  Critical  systems  Soft  systems  Viable  systems  model  Complexity  theory  Sustainability  Environmental  management Index. décimale : 001.424 Résumé : This paper investigates and discusses the use of systemic methodologies (SMs) developed in management science/operational research (MS/OR), in particular, those SM that have been informing the complexity inherent in environmental management abd sustainable (EM/S) practices. By surveying a sample of the top MS/OR and systems journals, we assese the extent to which systemic management science methodologies developed recently have been used in tackling EM/S problems. Titles and abstracts EM/S applications published in MS/OR and systems journals between 1989 and 2009 were queried for the occurence of typical keywords associated with a set of SMs (eg, complexity theory, systems dynamics, soft systems, critical systems, viable systems model). The survey identifies a set of articles representing the practice of either a particular methodology or of a mixture of various SMs in EM/S setting. By assembling and critically reviewing a sample of applications in EM/S the paper hopes to raise awarness among environmentalists, oparational researchers and management scientists of the benefits of using systemic approches developed in MS/OR and, in this way, to encourage further exchange and conversation between these fields of management DEWEY : 001.424 ISSN : 0160-5682 [article] Management science methodologies in environmental management and sustainability : discourses and applications [texte imprimé] / Paucar-Caceres, A., Auteur ; Espinosa, A., Auteur . - 2011 . - pp. 1601-1620. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1601-1620 Mots-clés : Management  sciences  Critical  systems  Soft  systems  Viable  systems  model  Complexity  theory  Sustainability  Environmental  management Index. décimale : 001.424 Résumé : This paper investigates and discusses the use of systemic methodologies (SMs) developed in management science/operational research (MS/OR), in particular, those SM that have been informing the complexity inherent in environmental management abd sustainable (EM/S) practices. By surveying a sample of the top MS/OR and systems journals, we assese the extent to which systemic management science methodologies developed recently have been used in tackling EM/S problems. Titles and abstracts EM/S applications published in MS/OR and systems journals between 1989 and 2009 were queried for the occurence of typical keywords associated with a set of SMs (eg, complexity theory, systems dynamics, soft systems, critical systems, viable systems model). The survey identifies a set of articles representing the practice of either a particular methodology or of a mixture of various SMs in EM/S setting. By assembling and critically reviewing a sample of applications in EM/S the paper hopes to raise awarness among environmentalists, oparational researchers and management scientists of the benefits of using systemic approches developed in MS/OR and, in this way, to encourage further exchange and conversation between these fields of management DEWEY : 001.424 ISSN : 0160-5682

In search of contextual variables in a stochastic DEA framework / Bandyopadhyay, B. in Journal of the operational research society (JORS), Vol. 62 N° 9 (Septembre 2011) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1621–1637 Titre : In search of contextual variables in a stochastic DEA framework : effect of regulation on efficiency of Indian cement industry Type de document : texte imprimé Auteurs : Bandyopadhyay, B., Auteur Année de publication : 2011 Article en page(s) : pp. 1621–1637 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Non-parametric  methods  Efficiency  Regulation Index. décimale : 001.424 Résumé : The paper assesses the difference in the nature of relationship between efficiency and its determinants of Indian cement producing firms in the presence and absence of environmental regulation. It provides an intuitive construct to identify the determinants of efficiency, which is followed by an empirical verification using a two-stage stochastic data envelopment analysis. Important quantitative determinants of efficiency include factor intensities of outputs, levels of pollution abatements, gross value added, whereas size, age, ownership type, development indicators of the place of location of a firm are among the qualitative determinants. An initial phase and a matured phase of regulation are considered in the paper. The main results suggest that capital intensity of output plays a positive role in increasing efficiency under regulation in the initial phase, material intensity in both phases and labour intensity, a negative role, in the subsequent phase. Higher levels of pollution abatements cause higher efficiency under regulation, while in the initial phase private firms report higher efficiencies under regulation; it is just the reverse in the subsequent phase. Size, age and development indicator of the state in which a firm is located can play a positive role to achieve higher efficiencies in the matured phase of regulation. DEWEY : 001.424 ISSN : 01605682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors2010193a.html [article] In search of contextual variables in a stochastic DEA framework : effect of regulation on efficiency of Indian cement industry [texte imprimé] / Bandyopadhyay, B., Auteur . - 2011 . - pp. 1621–1637. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1621–1637 Mots-clés : Non-parametric  methods  Efficiency  Regulation Index. décimale : 001.424 Résumé : The paper assesses the difference in the nature of relationship between efficiency and its determinants of Indian cement producing firms in the presence and absence of environmental regulation. It provides an intuitive construct to identify the determinants of efficiency, which is followed by an empirical verification using a two-stage stochastic data envelopment analysis. Important quantitative determinants of efficiency include factor intensities of outputs, levels of pollution abatements, gross value added, whereas size, age, ownership type, development indicators of the place of location of a firm are among the qualitative determinants. An initial phase and a matured phase of regulation are considered in the paper. The main results suggest that capital intensity of output plays a positive role in increasing efficiency under regulation in the initial phase, material intensity in both phases and labour intensity, a negative role, in the subsequent phase. Higher levels of pollution abatements cause higher efficiency under regulation, while in the initial phase private firms report higher efficiencies under regulation; it is just the reverse in the subsequent phase. Size, age and development indicator of the state in which a firm is located can play a positive role to achieve higher efficiencies in the matured phase of regulation. DEWEY : 001.424 ISSN : 01605682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors2010193a.html

Multicriteria evidential reasoning decision modelling and analysis / J-B. Yang in Journal of the operational research society (JORS), Vol. 62 N° 9 (Septembre 2011) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1638–1654 Titre : Multicriteria evidential reasoning decision modelling and analysis : prioritizing voices of customer Type de document : texte imprimé Auteurs : J-B. Yang, Auteur ; D-L. Xu, Auteur ; X. Xie, Auteur Année de publication : 2011 Article en page(s) : pp. 1638–1654 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Evidential  reasoning  Multiple  criteria  decision  analysis  Voices  of  customer  Ranking Index. décimale : 001.424 Résumé : In this paper, a new methodology is investigated to support the prioritization of the voices of customers through various customer satisfaction surveys. This new methodology consists of two key components: an innovative evidence-driven decision modelling framework for representing and transforming large amounts of data sets and a generic reasoning-based decision support process for aggregating evidence to prioritize the voices of customer on the basis of the Evidential Reasoning (ER) approach. Methods and frameworks for data collection and representation via multiple customer satisfaction surveys were examined first and the distinctive features of quantitative and qualitative survey data are analysed. Several novel yet natural and pragmatic rule-based functions are then proposed to transform survey data systematically and consistently from different measurement scales to a common scale, with the original features and profiles of the data preserved in the transformation process. These new transformation functions are proposed to mimic expert judgement processes and designed to be sufficiently flexible and rigorous so that expert judgements and domain specific knowledge can be taken into account naturally, systematically and consistently in the transformation process. The ER approach is used for synthesizing quantitative and qualitative data under uncertainty that can be caused due to missing data and ambiguous survey questions. A new generic method is also proposed for ranking the voices of customer based on qualitative measurement scales without having to quantify assessment grades to fixed numerical values. A case study is examined using an Intelligent Decision System (IDS) to illustrate the application of the decision modelling framework and decision support process for prioritizing the voices of customer for a world-leading car manufacturer. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors2010118a.html [article] Multicriteria evidential reasoning decision modelling and analysis : prioritizing voices of customer [texte imprimé] / J-B. Yang, Auteur ; D-L. Xu, Auteur ; X. Xie, Auteur . - 2011 . - pp. 1638–1654. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1638–1654 Mots-clés : Evidential  reasoning  Multiple  criteria  decision  analysis  Voices  of  customer  Ranking Index. décimale : 001.424 Résumé : In this paper, a new methodology is investigated to support the prioritization of the voices of customers through various customer satisfaction surveys. This new methodology consists of two key components: an innovative evidence-driven decision modelling framework for representing and transforming large amounts of data sets and a generic reasoning-based decision support process for aggregating evidence to prioritize the voices of customer on the basis of the Evidential Reasoning (ER) approach. Methods and frameworks for data collection and representation via multiple customer satisfaction surveys were examined first and the distinctive features of quantitative and qualitative survey data are analysed. Several novel yet natural and pragmatic rule-based functions are then proposed to transform survey data systematically and consistently from different measurement scales to a common scale, with the original features and profiles of the data preserved in the transformation process. These new transformation functions are proposed to mimic expert judgement processes and designed to be sufficiently flexible and rigorous so that expert judgements and domain specific knowledge can be taken into account naturally, systematically and consistently in the transformation process. The ER approach is used for synthesizing quantitative and qualitative data under uncertainty that can be caused due to missing data and ambiguous survey questions. A new generic method is also proposed for ranking the voices of customer based on qualitative measurement scales without having to quantify assessment grades to fixed numerical values. A case study is examined using an Intelligent Decision System (IDS) to illustrate the application of the decision modelling framework and decision support process for prioritizing the voices of customer for a world-leading car manufacturer. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors2010118a.html

Risk-averse decision making in overbooking problem / H. Xiong in Journal of the operational research society (JORS), Vol. 62 N° 9 (Septembre 2011) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1655–1665 Titre : Risk-averse decision making in overbooking problem Type de document : texte imprimé Auteurs : H. Xiong, Auteur ; J. Xie, Auteur ; X. Deng, Auteur Année de publication : 2011 Article en page(s) : pp. 1655–1665 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Revenue  management  Risk-averse  Overbooking  Marketing  Inventory Index. décimale : 001.424 Résumé : Traditional literature studying overbooking problems focuses on risk-neutral decision makers. In this paper, we propose a multi-period overbooking model incorporating risk-aversion and extend well-known structural results (the 3-region policy) under the risk-neutral case to the risk-averse one on the basis of an exponential utility function. We also show that the optimal policy for the risk-neutral decision maker can be obtained by letting the risk-aversion parameter approach to zero under the risk-averse case. Therefore, the extant results under the risk-neutral case can be interpreted as a special case of ours. We also investigate how the optimal policy changes with some cost parameters and the decision maker's degree of risk-aversion. Numerical results suggest that the optimal bounds in the 3-region policy may increase or decrease with the decision maker's degree of risk-aversion. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors2010130a.html [article] Risk-averse decision making in overbooking problem [texte imprimé] / H. Xiong, Auteur ; J. Xie, Auteur ; X. Deng, Auteur . - 2011 . - pp. 1655–1665. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1655–1665 Mots-clés : Revenue  management  Risk-averse  Overbooking  Marketing  Inventory Index. décimale : 001.424 Résumé : Traditional literature studying overbooking problems focuses on risk-neutral decision makers. In this paper, we propose a multi-period overbooking model incorporating risk-aversion and extend well-known structural results (the 3-region policy) under the risk-neutral case to the risk-averse one on the basis of an exponential utility function. We also show that the optimal policy for the risk-neutral decision maker can be obtained by letting the risk-aversion parameter approach to zero under the risk-averse case. Therefore, the extant results under the risk-neutral case can be interpreted as a special case of ours. We also investigate how the optimal policy changes with some cost parameters and the decision maker's degree of risk-aversion. Numerical results suggest that the optimal bounds in the 3-region policy may increase or decrease with the decision maker's degree of risk-aversion. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors2010130a.html

Prioritization of medical equipment for maintenance decisions / S. Taghipour in Journal of the operational research society (JORS), Vol. 62 N° 9 (Septembre 2011) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1666–1687 Titre : Prioritization of medical equipment for maintenance decisions Type de document : texte imprimé Auteurs : S. Taghipour, Auteur ; Banjevic, D., Auteur ; Jardine, A. K. S., Auteur Année de publication : 2011 Article en page(s) : pp. 1666–1687 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Medical  devices  Hospitals  Criticality  prioritization  Maintenance  decisions  Risk  MCDM  AHP Index. décimale : 001.424 Résumé : Clinical engineering departments in hospitals are responsible for establishing and regulating a Medical Equipment Management Program to ensure that medical devices are safe and reliable. In order to mitigate functional failures, significant and critical devices should be identified and prioritized. In this paper, we present a multi-criteria decision-making model to prioritize medical devices according to their criticality. Devices with lower criticality scores can be assigned a lower priority in a maintenance management program. However, those with higher scores should be investigated in detail to find the reasons for their higher criticality, and appropriate actions, such as ‘preventive maintenance’, ‘user training’, ‘redesigning the device’, etc, should be taken. In this paper,we also describe how individual score values obtained for each criterion can be used to establish guidelines for appropriate maintenance strategies for different classes of devices. The information of 26 different medical devices is extracted from a hospital's maintenance management system to illustrate an application of the proposed model. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors2010106a.html [article] Prioritization of medical equipment for maintenance decisions [texte imprimé] / S. Taghipour, Auteur ; Banjevic, D., Auteur ; Jardine, A. K. S., Auteur . - 2011 . - pp. 1666–1687. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1666–1687 Mots-clés : Medical  devices  Hospitals  Criticality  prioritization  Maintenance  decisions  Risk  MCDM  AHP Index. décimale : 001.424 Résumé : Clinical engineering departments in hospitals are responsible for establishing and regulating a Medical Equipment Management Program to ensure that medical devices are safe and reliable. In order to mitigate functional failures, significant and critical devices should be identified and prioritized. In this paper, we present a multi-criteria decision-making model to prioritize medical devices according to their criticality. Devices with lower criticality scores can be assigned a lower priority in a maintenance management program. However, those with higher scores should be investigated in detail to find the reasons for their higher criticality, and appropriate actions, such as ‘preventive maintenance’, ‘user training’, ‘redesigning the device’, etc, should be taken. In this paper,we also describe how individual score values obtained for each criterion can be used to establish guidelines for appropriate maintenance strategies for different classes of devices. The information of 26 different medical devices is extracted from a hospital's maintenance management system to illustrate an application of the proposed model. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors2010106a.html

Integer optimisation for the selection of a Twenty20 cricket team / G. D. Sharp in Journal of the operational research society (JORS), Vol. 62 N° 9 (Septembre 2011) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1688–1694 Titre : Integer optimisation for the selection of a Twenty20 cricket team Type de document : texte imprimé Auteurs : G. D. Sharp, Auteur ; W. J. Brettenny, Auteur ; J. W. Gonsalves, Auteur Année de publication : 2011 Article en page(s) : pp. 1688–1694 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Sports  Integer  programming  Team  selection  Statistics Index. décimale : 001.424 Résumé : The attraction of Twenty20 cricket for spectators has sparked huge commercial interest in the marketing of the concept. The International Cricket Council has sanctioned world tournaments, the inaugural tournament in South Africa and the recent 2009 event, while the 2008 and 2009 Indian Premier League tournaments have generated profitable returns for both players and franchise owners. This paper describes methods for quantifying a cricket player's performance based on his ability to score runs and take wickets. These performance measures are then used to determine the optimal team using an integer programme. An illustration of the method is provided using data from the inaugural Twenty20 World Cup held in South Africa in 2007. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors2010122a.html [article] Integer optimisation for the selection of a Twenty20 cricket team [texte imprimé] / G. D. Sharp, Auteur ; W. J. Brettenny, Auteur ; J. W. Gonsalves, Auteur . - 2011 . - pp. 1688–1694. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1688–1694 Mots-clés : Sports  Integer  programming  Team  selection  Statistics Index. décimale : 001.424 Résumé : The attraction of Twenty20 cricket for spectators has sparked huge commercial interest in the marketing of the concept. The International Cricket Council has sanctioned world tournaments, the inaugural tournament in South Africa and the recent 2009 event, while the 2008 and 2009 Indian Premier League tournaments have generated profitable returns for both players and franchise owners. This paper describes methods for quantifying a cricket player's performance based on his ability to score runs and take wickets. These performance measures are then used to determine the optimal team using an integer programme. An illustration of the method is provided using data from the inaugural Twenty20 World Cup held in South Africa in 2007. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors2010122a.html

Media selection in the presence of flexible factors and imprecise data / Farzipoor Saen, R. in Journal of the operational research society (JORS), Vol. 62 N° 9 (Septembre 2011) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1695–1703 Titre : Media selection in the presence of flexible factors and imprecise data Type de document : texte imprimé Auteurs : Farzipoor Saen, R., Auteur Année de publication : 2011 Article en page(s) : pp. 1695–1703 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Imprecise  data  envelopment  analysis  Media  selection  Flexible  factors Index. décimale : 001.424 Résumé : This paper depicts the media selection problem through a Data envelopment analysis (DEA) model, while allowing for the incorporation of both flexible factors and imprecise data. A numerical example demonstrates the application of the proposed method. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors2010115a.html [article] Media selection in the presence of flexible factors and imprecise data [texte imprimé] / Farzipoor Saen, R., Auteur . - 2011 . - pp. 1695–1703. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1695–1703 Mots-clés : Imprecise  data  envelopment  analysis  Media  selection  Flexible  factors Index. décimale : 001.424 Résumé : This paper depicts the media selection problem through a Data envelopment analysis (DEA) model, while allowing for the incorporation of both flexible factors and imprecise data. A numerical example demonstrates the application of the proposed method. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors2010115a.html

Designing greedy algorithms for the flow-shop problem by means of Empirically Adjusted Greedy Heuristics (EAGH) / A. Corominas in Journal of the operational research society (JORS), Vol. 62 N° 9 (Septembre 2011) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1704–1710 Titre : Designing greedy algorithms for the flow-shop problem by means of Empirically Adjusted Greedy Heuristics (EAGH) Type de document : texte imprimé Auteurs : A. Corominas, Auteur ; R. Pastor, Auteur Année de publication : 2011 Article en page(s) : pp. 1704–1710 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Heuristics  Greedy  algorithms  Flow-shop  Combinatorial  optimization Index. décimale : 001.424 Résumé : This paper introduces Empirically Adjusted Greedy Heuristics (EAGH), a procedure for designing greedy algorithms for a given combinatorial optimization problem and illustrates the way in which EAGH works with an application to minimize the makespan in the permutation flow-shop problem. The basic idea behind EAGH is that a greedy heuristic can be seen as a member of an infinite set of heuristics, this set being defined by a function that depends on several parameters. Each set of values of the parameters corresponds to a specific greedy heuristic. Then, the best element of the set, for a training set of instances of the problem, is found by applying a non-linear optimization algorithm to a function that measures the quality of the obtained solutions to the instances of the training set, and which depends on the parameters that characterize each specific algorithm. EAGH allows improving known heuristics or finding good new ones. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors2010131a.html [article] Designing greedy algorithms for the flow-shop problem by means of Empirically Adjusted Greedy Heuristics (EAGH) [texte imprimé] / A. Corominas, Auteur ; R. Pastor, Auteur . - 2011 . - pp. 1704–1710. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1704–1710 Mots-clés : Heuristics  Greedy  algorithms  Flow-shop  Combinatorial  optimization Index. décimale : 001.424 Résumé : This paper introduces Empirically Adjusted Greedy Heuristics (EAGH), a procedure for designing greedy algorithms for a given combinatorial optimization problem and illustrates the way in which EAGH works with an application to minimize the makespan in the permutation flow-shop problem. The basic idea behind EAGH is that a greedy heuristic can be seen as a member of an infinite set of heuristics, this set being defined by a function that depends on several parameters. Each set of values of the parameters corresponds to a specific greedy heuristic. Then, the best element of the set, for a training set of instances of the problem, is found by applying a non-linear optimization algorithm to a function that measures the quality of the obtained solutions to the instances of the training set, and which depends on the parameters that characterize each specific algorithm. EAGH allows improving known heuristics or finding good new ones. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors2010131a.html

Predicting the false alarm rate in multi-institution mortality monitoring / A. Bottle in Journal of the operational research society (JORS), Vol. 62 N° 9 (Septembre 2011) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1711–1718 Titre : Predicting the false alarm rate in multi-institution mortality monitoring Type de document : texte imprimé Auteurs : A. Bottle, Auteur ; P. Aylin, Auteur Année de publication : 2011 Article en page(s) : pp. 1711–1718 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Quality  Statistics  Simulation  Methodology  Health  service Index. décimale : 001.424 Résumé : Statistical process control is increasingly used by single hospitals or centres to monitor their performance, but national monitoring across multiple centres, measures and groups incurs higher false alarm rates unless the method is modified. We consider setting the threshold for cumulative sum charts to produce the desired false alarm rate, taking into account the centre volume and expected outcome rate. We used simulation to estimate the false alarm and successful detection rates for a variety of chart thresholds. We thereby calculated the ‘cost’ of a higher threshold compared with one set to give a false alarm rate of 5% for three clinical groups of common interest. The false alarm rate often showed non-linear relations with the threshold, volume and expected mortality rate but an equation was found with good approximation to the simulated values. The relation between these factors and the ‘cost’ of a higher threshold was not straightforward. The ‘cost’ (difference in number of deaths) incurred by raising the chart threshold provides an intuitive measure and is applicable to other settings. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors2010121a.html [article] Predicting the false alarm rate in multi-institution mortality monitoring [texte imprimé] / A. Bottle, Auteur ; P. Aylin, Auteur . - 2011 . - pp. 1711–1718. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1711–1718 Mots-clés : Quality  Statistics  Simulation  Methodology  Health  service Index. décimale : 001.424 Résumé : Statistical process control is increasingly used by single hospitals or centres to monitor their performance, but national monitoring across multiple centres, measures and groups incurs higher false alarm rates unless the method is modified. We consider setting the threshold for cumulative sum charts to produce the desired false alarm rate, taking into account the centre volume and expected outcome rate. We used simulation to estimate the false alarm and successful detection rates for a variety of chart thresholds. We thereby calculated the ‘cost’ of a higher threshold compared with one set to give a false alarm rate of 5% for three clinical groups of common interest. The false alarm rate often showed non-linear relations with the threshold, volume and expected mortality rate but an equation was found with good approximation to the simulated values. The relation between these factors and the ‘cost’ of a higher threshold was not straightforward. The ‘cost’ (difference in number of deaths) incurred by raising the chart threshold provides an intuitive measure and is applicable to other settings. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors2010121a.html

A profit-based scoring system in consumer credit: making ac credit quisition decisions forcards / R. T. Stewart in Journal of the operational research society (JORS), Vol. 62 N° 9 (Septembre 2011) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1719–1725 Titre : A profit-based scoring system in consumer credit: making ac credit quisition decisions forcards Type de document : texte imprimé Auteurs : R. T. Stewart, Auteur Année de publication : 2011 Article en page(s) : pp. 1719–1725 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Finance  Banking  Consumer  credit  Credit  scoring  Risk  Multi-objective Index. décimale : 001.424 Résumé : Consumer credit scoring is one of the most successful applications of quantitative analysis in business with nearly every major lender using charge-off models to make decisions. Yet banks do not extend credit to control charge-off, but to secure profit. So, while charge-off models work well in rank-ordering the loan default costs associated with lending and are ubiquitous throughout the industry, the equivalent models on the revenue side are not being used despite the need. This paper outlines a profit-based scoring system for credit cards to be used for acquisition decisions by addressing three issues. First, the paper explains why credit card profit models—as opposed to cost or charge-off models—have been difficult to build and implement. Second, a methodology for modelling revenue on credit cards at application is proposed. Finally, acquisition strategies are explored that use both a spend model and a charge-off model to balance tradeoffs between charge-off, revenue, and volume. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors2010135a.html [article] A profit-based scoring system in consumer credit: making ac credit quisition decisions forcards [texte imprimé] / R. T. Stewart, Auteur . - 2011 . - pp. 1719–1725. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1719–1725 Mots-clés : Finance  Banking  Consumer  credit  Credit  scoring  Risk  Multi-objective Index. décimale : 001.424 Résumé : Consumer credit scoring is one of the most successful applications of quantitative analysis in business with nearly every major lender using charge-off models to make decisions. Yet banks do not extend credit to control charge-off, but to secure profit. So, while charge-off models work well in rank-ordering the loan default costs associated with lending and are ubiquitous throughout the industry, the equivalent models on the revenue side are not being used despite the need. This paper outlines a profit-based scoring system for credit cards to be used for acquisition decisions by addressing three issues. First, the paper explains why credit card profit models—as opposed to cost or charge-off models—have been difficult to build and implement. Second, a methodology for modelling revenue on credit cards at application is proposed. Finally, acquisition strategies are explored that use both a spend model and a charge-off model to balance tradeoffs between charge-off, revenue, and volume. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors2010135a.html

A discrete competitive facility location model with variable attractiveness / H. Küçükaydin in Journal of the operational research society (JORS), Vol. 62 N° 9 (Septembre 2011) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1726–1741 Titre : A discrete competitive facility location model with variable attractiveness Type de document : texte imprimé Auteurs : H. Küçükaydin, Auteur ; N. Aras, Auteur ; Altinel, I. K., Auteur Année de publication : 2011 Article en page(s) : pp. 1726–1741 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Competitive  facility  location  Variable  facility  attractiveness  Mixed-integer  nonlinear  programming  Lagrangean  heuristic  Branch-and-bound Index. décimale : 001.424 Résumé : We consider the discrete version of the competitive facility location problem in which new facilities have to be located by a new market entrant firm to compete against already existing facilities that may belong to one or more competitors. The demand is assumed to be aggregated at certain points in the plane and the new facilities can be located at predetermined candidate sites. We employ Huff's gravity-based rule in modelling the behaviour of the customers where the probability that customers at a demand point patronize a certain facility is proportional to the facility attractiveness and inversely proportional to the distance between the facility site and demand point. The objective of the firm is to determine the locations of the new facilities and their attractiveness levels so as to maximize the profit, which is calculated as the revenue from the customers less the fixed cost of opening the facilities and variable cost of setting their attractiveness levels. We formulate a mixed-integer nonlinear programming model for this problem and propose three methods for its solution: a Lagrangean heuristic, a branch-and-bound method with Lagrangean relaxation, and another branch-and-bound method with nonlinear programming relaxation. Computational results obtained on a set of randomly generated instances show that the last method outperforms the others in terms of accuracy and efficiency and can provide an optimal solution in a reasonable amount of time. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors2010136a.html [article] A discrete competitive facility location model with variable attractiveness [texte imprimé] / H. Küçükaydin, Auteur ; N. Aras, Auteur ; Altinel, I. K., Auteur . - 2011 . - pp. 1726–1741. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1726–1741 Mots-clés : Competitive  facility  location  Variable  facility  attractiveness  Mixed-integer  nonlinear  programming  Lagrangean  heuristic  Branch-and-bound Index. décimale : 001.424 Résumé : We consider the discrete version of the competitive facility location problem in which new facilities have to be located by a new market entrant firm to compete against already existing facilities that may belong to one or more competitors. The demand is assumed to be aggregated at certain points in the plane and the new facilities can be located at predetermined candidate sites. We employ Huff's gravity-based rule in modelling the behaviour of the customers where the probability that customers at a demand point patronize a certain facility is proportional to the facility attractiveness and inversely proportional to the distance between the facility site and demand point. The objective of the firm is to determine the locations of the new facilities and their attractiveness levels so as to maximize the profit, which is calculated as the revenue from the customers less the fixed cost of opening the facilities and variable cost of setting their attractiveness levels. We formulate a mixed-integer nonlinear programming model for this problem and propose three methods for its solution: a Lagrangean heuristic, a branch-and-bound method with Lagrangean relaxation, and another branch-and-bound method with nonlinear programming relaxation. Computational results obtained on a set of randomly generated instances show that the last method outperforms the others in terms of accuracy and efficiency and can provide an optimal solution in a reasonable amount of time. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors2010136a.html

Modelling the sustainability of mass tourism in island tourist economies / Y. Xing in Journal of the operational research society (JORS), Vol. 62 N° 9 (Septembre 2011) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1742–1752 Titre : Modelling the sustainability of mass tourism in island tourist economies Type de document : texte imprimé Auteurs : Y. Xing, Auteur ; B. Dangerfield, Auteur Année de publication : 2011 Article en page(s) : pp. 1742–1752 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : System  dynamics  Sustainable  development  Tourist  economy  Tourism  policy  analysis Index. décimale : 001.424 Résumé : Tourism is one of the world's largest industries and is a source of jobs across national and regional economies. Assessing the economic, environmental and social impacts of tourism development has become a major activity within the tourism and sustainable development communities. The purpose of this research is to demonstrate the contribution of system dynamics for analysing policies that can not only promote sustainable tourism development, but also act as a warning signal to the industry about the potential negative consequences of uncontrolled growth of mass tourism, particularly in island tourist economies. Previous research in the tourism sector has been fragmented, when a holistic approach is needed in order to try to coerce some alignment in the views of the various stakeholders. The main research results illustrated in this paper are: a generic model of a tourism system informed by the (mainly) South European island tourist economies and a set of scenarios illustrating examples of policy analysis. The generic model and the modelling process developed in this research will have some transferability to other issues concerned with policymaking for sustainable development. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors201077a.html [article] Modelling the sustainability of mass tourism in island tourist economies [texte imprimé] / Y. Xing, Auteur ; B. Dangerfield, Auteur . - 2011 . - pp. 1742–1752. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1742–1752 Mots-clés : System  dynamics  Sustainable  development  Tourist  economy  Tourism  policy  analysis Index. décimale : 001.424 Résumé : Tourism is one of the world's largest industries and is a source of jobs across national and regional economies. Assessing the economic, environmental and social impacts of tourism development has become a major activity within the tourism and sustainable development communities. The purpose of this research is to demonstrate the contribution of system dynamics for analysing policies that can not only promote sustainable tourism development, but also act as a warning signal to the industry about the potential negative consequences of uncontrolled growth of mass tourism, particularly in island tourist economies. Previous research in the tourism sector has been fragmented, when a holistic approach is needed in order to try to coerce some alignment in the views of the various stakeholders. The main research results illustrated in this paper are: a generic model of a tourism system informed by the (mainly) South European island tourist economies and a set of scenarios illustrating examples of policy analysis. The generic model and the modelling process developed in this research will have some transferability to other issues concerned with policymaking for sustainable development. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors201077a.html

Theory and application of perceptual positions to data collection and analysis in military environments / W. Hobbs in Journal of the operational research society (JORS), Vol. 62 N° 9 (Septembre 2011) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1753–1764 Titre : Theory and application of perceptual positions to data collection and analysis in military environments Type de document : texte imprimé Auteurs : W. Hobbs, Auteur ; N. J. Curtis, Auteur Année de publication : 2011 Article en page(s) : pp. 1753–1764 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Practice  of  OR  Methodology  Defence  studies  Military Index. décimale : 001.424 Résumé : We describe a novel approach to planning and interpretation of data collection activities in military environments, based on the notions of perceptual positions of self, other and detached observer when viewing the same event. We have reinterpreted the results of previous field experiments involving the introduction of advanced equipment as part of soldier modernisation and believe that we now have a better understanding of why some attempts at data collection were not as successful as others. We propose a protocol based on the Army Practitioner providing first position data (subjective), the Analyst Observer and instrumentation providing third position data (objective) and the Subject Matter Adviser giving second position data (speculative). Although there is often a focus on first and third position data during field trials, second position data enables extrapolation to other contexts. This is especially important for exploratory studies investigating future concepts. Taken together, the combination of the three positions leads to a better strategy to enhance data collection of complex military systems. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors2010124a.html [article] Theory and application of perceptual positions to data collection and analysis in military environments [texte imprimé] / W. Hobbs, Auteur ; N. J. Curtis, Auteur . - 2011 . - pp. 1753–1764. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1753–1764 Mots-clés : Practice  of  OR  Methodology  Defence  studies  Military Index. décimale : 001.424 Résumé : We describe a novel approach to planning and interpretation of data collection activities in military environments, based on the notions of perceptual positions of self, other and detached observer when viewing the same event. We have reinterpreted the results of previous field experiments involving the introduction of advanced equipment as part of soldier modernisation and believe that we now have a better understanding of why some attempts at data collection were not as successful as others. We propose a protocol based on the Army Practitioner providing first position data (subjective), the Analyst Observer and instrumentation providing third position data (objective) and the Subject Matter Adviser giving second position data (speculative). Although there is often a focus on first and third position data during field trials, second position data enables extrapolation to other contexts. This is especially important for exploratory studies investigating future concepts. Taken together, the combination of the three positions leads to a better strategy to enhance data collection of complex military systems. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors2010124a.html

Scheduling jobs with chain precedence constraints and deteriorating jobs / Wang, J.-B. in Journal of the operational research society (JORS), Vol. 62 N° 9 (Septembre 2011) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1765–1770 Titre : Scheduling jobs with chain precedence constraints and deteriorating jobs Type de document : texte imprimé Auteurs : Wang, J.-B., Auteur ; J-J. Wang, Auteur ; P. Ji, Auteur Année de publication : 2011 Article en page(s) : pp. 1765–1770 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Scheduling  Single  machine  Deteriorating  jobs  Weighted  sum  of  squared  completion  times Index. décimale : 001.424 Résumé : In this paper we consider a single machine scheduling problem with deteriorating jobs. By deteriorating jobs, we mean that the processing time of a job is a simple linear function of its execution starting time. For the jobs with chain precedence constraints, we prove that the weighted sum of squared completion times minimization problem with strong chains and weak chains can be solved in polynomial time, respectively. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors2010120a.html [article] Scheduling jobs with chain precedence constraints and deteriorating jobs [texte imprimé] / Wang, J.-B., Auteur ; J-J. Wang, Auteur ; P. Ji, Auteur . - 2011 . - pp. 1765–1770. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 62 N° 9 (Septembre 2011) . - pp. 1765–1770 Mots-clés : Scheduling  Single  machine  Deteriorating  jobs  Weighted  sum  of  squared  completion  times Index. décimale : 001.424 Résumé : In this paper we consider a single machine scheduling problem with deteriorating jobs. By deteriorating jobs, we mean that the processing time of a job is a simple linear function of its execution starting time. For the jobs with chain precedence constraints, we prove that the weighted sum of squared completion times minimization problem with strong chains and weak chains can be solved in polynomial time, respectively. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n9/abs/jors2010120a.html

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