Dépouillements

Enterprise risk management / Wu, D. in Journal of the operational research society (JORS), Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 179–190 Titre : Enterprise risk management : coping with model risk in a large bank Type de document : texte imprimé Auteurs : Wu, D., Auteur ; D. L. Olson, Auteur Année de publication : 2011 Article en page(s) : pp. 179–190 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Enterprise  risk  management  Model  risk  management  Credit  risk  Statistical  analysis Index. décimale : 001.424 Résumé : Enterprise risk management (ERM) has become an important topic in today's more complex, interrelated global business environment, replete with threats from natural, political, economic, and technical sources. Banks especially face financial risks, as the news makes ever more apparent in 2008. This paper demonstrates support to risk management through validation of predictive scorecards for a large bank. The bank developed a model to assess account creditworthiness. The model is validated and compared to credit bureau scores. Alternative methods of risk measurement are compared. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008144a.html [article] Enterprise risk management : coping with model risk in a large bank [texte imprimé] / Wu, D., Auteur ; D. L. Olson, Auteur . - 2011 . - pp. 179–190. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 179–190 Mots-clés : Enterprise  risk  management  Model  risk  management  Credit  risk  Statistical  analysis Index. décimale : 001.424 Résumé : Enterprise risk management (ERM) has become an important topic in today's more complex, interrelated global business environment, replete with threats from natural, political, economic, and technical sources. Banks especially face financial risks, as the news makes ever more apparent in 2008. This paper demonstrates support to risk management through validation of predictive scorecards for a large bank. The bank developed a model to assess account creditworthiness. The model is validated and compared to credit bureau scores. Alternative methods of risk measurement are compared. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008144a.html

First, do no harm? A framework for evaluating new versus reprocessed medical devices / T. Sloan in Journal of the operational research society (JORS), Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 191–201 Titre : First, do no harm? A framework for evaluating new versus reprocessed medical devices Type de document : texte imprimé Auteurs : T. Sloan, Auteur Année de publication : 2011 Article en page(s) : pp. 191–201 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Cost  benefit  Health  service  Hospitals  Replacement  policy  Risk Index. décimale : 001.424 Résumé : More than ever before, health care providers are under intense pressure to control costs. Medical devices represent a significant ‘hard’ cost, with worldwide spending exceeding USD 235 billion. A growing number of health care providers are engaging in the practice of reprocessing—sterilizing and reusing medical devices labelled only for a single use. The ethical and technical dimensions of this practice have received much attention, but its economic aspects remain largely unexamined. This paper presents a Markov decision process framework that a health care provider can use to decide whether to use new or reprocessed devices in a given context. Two cases are studied: completely observable device condition and partially observable device condition. After briefly discussing structural results for the two cases, several examples are presented to illustrate how the model can be applied in practice. Useful results can be computed quickly with minimal data. A key insight of the model is that perfect information regarding the device condition is often not required to make a sound decision. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008137a.html [article] First, do no harm? A framework for evaluating new versus reprocessed medical devices [texte imprimé] / T. Sloan, Auteur . - 2011 . - pp. 191–201. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 191–201 Mots-clés : Cost  benefit  Health  service  Hospitals  Replacement  policy  Risk Index. décimale : 001.424 Résumé : More than ever before, health care providers are under intense pressure to control costs. Medical devices represent a significant ‘hard’ cost, with worldwide spending exceeding USD 235 billion. A growing number of health care providers are engaging in the practice of reprocessing—sterilizing and reusing medical devices labelled only for a single use. The ethical and technical dimensions of this practice have received much attention, but its economic aspects remain largely unexamined. This paper presents a Markov decision process framework that a health care provider can use to decide whether to use new or reprocessed devices in a given context. Two cases are studied: completely observable device condition and partially observable device condition. After briefly discussing structural results for the two cases, several examples are presented to illustrate how the model can be applied in practice. Useful results can be computed quickly with minimal data. A key insight of the model is that perfect information regarding the device condition is often not required to make a sound decision. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008137a.html

Designing a flexible approach for higher professional education by means of simulation modelling / A. Schellekens in Journal of the operational research society (JORS), Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 202–210 Titre : Designing a flexible approach for higher professional education by means of simulation modelling Type de document : texte imprimé Auteurs : A. Schellekens, Auteur ; F. Paas, Auteur ; A. Verbraeck, Auteur Année de publication : 2011 Article en page(s) : pp. 202–210 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Development  Education  Organizational  studies  Simulation Index. décimale : 001.424 Résumé : Operational flexibility is a prerequisite for innovations in higher education. Educational programmes have an operational structure which restricts their flexibility. Design principles from the fields of operations management and instructional design were applied for the design of a flexible approach in educational programmes. In a case study, the curriculum and operational data from an institute for higher professional education in the Netherlands were used to develop a discrete-event simulation model, in order to demonstrate effects of operational changes on the flexibility of their educational programmes. Programme coordinators of the institute validated the model and considered it as a feasible solution for organizing their educational programmes, and as a contribution to educational innovation. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008133a.html [article] Designing a flexible approach for higher professional education by means of simulation modelling [texte imprimé] / A. Schellekens, Auteur ; F. Paas, Auteur ; A. Verbraeck, Auteur . - 2011 . - pp. 202–210. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 202–210 Mots-clés : Development  Education  Organizational  studies  Simulation Index. décimale : 001.424 Résumé : Operational flexibility is a prerequisite for innovations in higher education. Educational programmes have an operational structure which restricts their flexibility. Design principles from the fields of operations management and instructional design were applied for the design of a flexible approach in educational programmes. In a case study, the curriculum and operational data from an institute for higher professional education in the Netherlands were used to develop a discrete-event simulation model, in order to demonstrate effects of operational changes on the flexibility of their educational programmes. Programme coordinators of the institute validated the model and considered it as a feasible solution for organizing their educational programmes, and as a contribution to educational innovation. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008133a.html

The impact of information technology on the banking industry / S. J. Ho in Journal of the operational research society (JORS), Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 211–221 Titre : The impact of information technology on the banking industry Type de document : texte imprimé Auteurs : S. J. Ho, Auteur ; S. K. Mallick, Auteur Année de publication : 2011 Article en page(s) : pp. 211–221 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Information  technology  Heterogenous  competition  Banking  services Index. décimale : 001.424 Résumé : This paper analyses the effects of investment in information technologies (IT) in the banking sector using bank-level data from a panel of 68 US banks over the period 1986–2005. Although IT can improve bank's performance by reducing operational cost (supply side), it can bring in competition among banks in order to embrace new technology (demand side). Since most empirical studies have adopted the production function approach, it is difficult to identify which effect has dominated. In a differentiated model with network effects, this paper characterizes the conditions to identify these two effects. The results suggest that (at individual firm levels) the bank profits can decline due to adoption and diffusion of IT investment, reflecting negative network competition effects in this industry. Using panel cointegration tests, we confirm that the estimated profit equation is indeed a long-run equilibrium relation. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008128a.html [article] The impact of information technology on the banking industry [texte imprimé] / S. J. Ho, Auteur ; S. K. Mallick, Auteur . - 2011 . - pp. 211–221. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 211–221 Mots-clés : Information  technology  Heterogenous  competition  Banking  services Index. décimale : 001.424 Résumé : This paper analyses the effects of investment in information technologies (IT) in the banking sector using bank-level data from a panel of 68 US banks over the period 1986–2005. Although IT can improve bank's performance by reducing operational cost (supply side), it can bring in competition among banks in order to embrace new technology (demand side). Since most empirical studies have adopted the production function approach, it is difficult to identify which effect has dominated. In a differentiated model with network effects, this paper characterizes the conditions to identify these two effects. The results suggest that (at individual firm levels) the bank profits can decline due to adoption and diffusion of IT investment, reflecting negative network competition effects in this industry. Using panel cointegration tests, we confirm that the estimated profit equation is indeed a long-run equilibrium relation. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008128a.html

Mean and bold? On separating merger economies from structural efficiency gains in the drinking water sector / K. De Witte in Journal of the operational research society (JORS), Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 222–234 Titre : Mean and bold? On separating merger economies from structural efficiency gains in the drinking water sector Type de document : texte imprimé Auteurs : K. De Witte, Auteur ; E. Dijkgraaf, Auteur Année de publication : 2011 Article en page(s) : pp. 222–234 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Mergers  and  acquisitions  Efficiency  Scale  economies  Water  sector  Nonparametric  and  parametric  estimation Index. décimale : 001.424 Résumé : The Dutch drinking water sector experienced two drastic changes over the last 10 years. Firstly, the sector association started a voluntary benchmarking aimed to increase the efficiency and effectiveness of the sector. Secondly, merger activity arose. This paper develops a nonparametric model to dissect and distinguish the effects on efficiency of these evolutions. Parametric corrected ordinarily least squares (Fourier) tests show the robustness of the model with respect to the specification and its variables. Although detecting an efficiency enhancing effect of benchmarking, we find insignificant merger economies due to the absence of scale economies and the absence of increased incentives to fight inefficiencies. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008129a.html [article] Mean and bold? On separating merger economies from structural efficiency gains in the drinking water sector [texte imprimé] / K. De Witte, Auteur ; E. Dijkgraaf, Auteur . - 2011 . - pp. 222–234. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 222–234 Mots-clés : Mergers  and  acquisitions  Efficiency  Scale  economies  Water  sector  Nonparametric  and  parametric  estimation Index. décimale : 001.424 Résumé : The Dutch drinking water sector experienced two drastic changes over the last 10 years. Firstly, the sector association started a voluntary benchmarking aimed to increase the efficiency and effectiveness of the sector. Secondly, merger activity arose. This paper develops a nonparametric model to dissect and distinguish the effects on efficiency of these evolutions. Parametric corrected ordinarily least squares (Fourier) tests show the robustness of the model with respect to the specification and its variables. Although detecting an efficiency enhancing effect of benchmarking, we find insignificant merger economies due to the absence of scale economies and the absence of increased incentives to fight inefficiencies. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008129a.html

Electricity pool prices / A. J. Conejo in Journal of the operational research society (JORS), Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 235–245 Titre : Electricity pool prices : long-term uncertainty characterization for futures-market trading and risk management Type de document : texte imprimé Auteurs : A. J. Conejo, Auteur ; F. J. Nogales, Auteur ; M. Carrión, Auteur Année de publication : 2011 Article en page(s) : pp. 235–245 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Electricity  pool  prices  Year-ahead  forecasting  Forward  trading  Futures  prices  Scenarios Index. décimale : 001.424 Résumé : Organized trading for electricity includes both the pool and the futures market. Pool prices are volatile while the prices of the futures-market products are comparatively more stable. Thus, futures-market products constitute hedging instruments to reduce the risk suffered by any market agent. Electricity market agents engage in both pool and futures market transactions seeking to maximize their respective profits/utilities for a given risk level on profit variability. To make informed decisions, the market agent must gather as much accurate information as possible on the pool prices covering the whole time horizon spanned by the futures-market product. This paper provides a novel technique to represent conveniently the uncertainty associated with pool prices during long- or medium-term horizons through a set of scenarios, that is, pool price realizations. The proposed technique uses the prices of the futures-market products as long-term explanatory variables and exploits the short-term structure of the pool prices. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008140a.html [article] Electricity pool prices : long-term uncertainty characterization for futures-market trading and risk management [texte imprimé] / A. J. Conejo, Auteur ; F. J. Nogales, Auteur ; M. Carrión, Auteur . - 2011 . - pp. 235–245. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 235–245 Mots-clés : Electricity  pool  prices  Year-ahead  forecasting  Forward  trading  Futures  prices  Scenarios Index. décimale : 001.424 Résumé : Organized trading for electricity includes both the pool and the futures market. Pool prices are volatile while the prices of the futures-market products are comparatively more stable. Thus, futures-market products constitute hedging instruments to reduce the risk suffered by any market agent. Electricity market agents engage in both pool and futures market transactions seeking to maximize their respective profits/utilities for a given risk level on profit variability. To make informed decisions, the market agent must gather as much accurate information as possible on the pool prices covering the whole time horizon spanned by the futures-market product. This paper provides a novel technique to represent conveniently the uncertainty associated with pool prices during long- or medium-term horizons through a set of scenarios, that is, pool price realizations. The proposed technique uses the prices of the futures-market products as long-term explanatory variables and exploits the short-term structure of the pool prices. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008140a.html

Waiting list behaviour and the consequences for NHS targets / J. Bowers in Journal of the operational research society (JORS), Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 246–254 Titre : Waiting list behaviour and the consequences for NHS targets Type de document : texte imprimé Auteurs : J. Bowers, Auteur Année de publication : 2011 Article en page(s) : pp. 246–254 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Health  service  Simulation  Queuing Index. décimale : 001.424 Résumé : The United Kingdom's National Health Service (NHS) is investing considerable resources in reducing patient waiting times for elective treatment. This paper describes the development of a waiting list model and its use in a simulation to assess management options. Simulation usually assumes that waiting is adequately described by simple queuing disciplines, typically first-in-first-out. However, waiting in the United Kingdom's NHS is a more complex phenomenon. The waiting list behaviour is explored through an analysis of the changes in waiting time distributions for elective orthopaedics in one Scottish Health Board, NHS Fife. The evolving distributions suggest that there have been substantial changes in priorities in response to the various NHS targets. However, in the short or medium term, the form of the distribution appears reasonably stable, providing a basis for estimating future waiting times in different scenarios. A model of the waiting behaviour and prioritization in the appointment allocations was embedded in a simulation of the complete elective orthopaedic patient journey from referral, through outpatients and diagnostics to surgery. The model has been used to explore the consequences of various management options in the context of the NHS target that no patient should wait more than 18 weeks between referral and treatment. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008149a.html [article] Waiting list behaviour and the consequences for NHS targets [texte imprimé] / J. Bowers, Auteur . - 2011 . - pp. 246–254. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 246–254 Mots-clés : Health  service  Simulation  Queuing Index. décimale : 001.424 Résumé : The United Kingdom's National Health Service (NHS) is investing considerable resources in reducing patient waiting times for elective treatment. This paper describes the development of a waiting list model and its use in a simulation to assess management options. Simulation usually assumes that waiting is adequately described by simple queuing disciplines, typically first-in-first-out. However, waiting in the United Kingdom's NHS is a more complex phenomenon. The waiting list behaviour is explored through an analysis of the changes in waiting time distributions for elective orthopaedics in one Scottish Health Board, NHS Fife. The evolving distributions suggest that there have been substantial changes in priorities in response to the various NHS targets. However, in the short or medium term, the form of the distribution appears reasonably stable, providing a basis for estimating future waiting times in different scenarios. A model of the waiting behaviour and prioritization in the appointment allocations was embedded in a simulation of the complete elective orthopaedic patient journey from referral, through outpatients and diagnostics to surgery. The model has been used to explore the consequences of various management options in the context of the NHS target that no patient should wait more than 18 weeks between referral and treatment. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008149a.html

A system dynamics-based simulation study for managing clinical governance and pathways in a hospital / M. Maliapen in Journal of the operational research society (JORS), Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 255–264 Titre : A system dynamics-based simulation study for managing clinical governance and pathways in a hospital Type de document : texte imprimé Auteurs : M. Maliapen, Auteur ; B. C. Dangerfield, Auteur Année de publication : 2011 Article en page(s) : pp. 255–264 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Clinical  pathways  System  dynamics  Decision  support  system  Diagnostic-related  groups  (DRG) Index. décimale : 001.424 Résumé : This paper examines the development of clinical pathways (CP) in a hospital in Australia based on empirical clinical data of patient episodes. A system dynamics (SD)-based decision support system is developed and analysed for this purpose. The study highlights the scenarios that will help hospital administrators to redistribute caseloads among admitting clinicians with a focus on multiple diagnostic-related groups (DRGs) as the means to improve the patient turnaround and hospital throughput without compromising quality patient care. DRGs are the best known classification system used in a casemix funding model. Casemix is a DRG-based government funding model for hospitals with a mix of performance measures aiming to reward initiatives that increase efficiencies in hospitals. The classification system groups inpatient stays into clinically meaningful categories of similar levels of complexity that consume similar amounts of resources. Policy explorations reveal various combinations of the dominant policies that hospital management can adopt. With the use of visual interfaces, executives can manipulate the DSS to test various scenarios. Experimental evidence based on focus groups demonstrated that it can enhance group learning processes and improve decision making. The findings are supported by other recent studies of CP implementation on various DRGs. These showed substantial reduction in length of stay, costs and resource utilization. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008134a.html [article] A system dynamics-based simulation study for managing clinical governance and pathways in a hospital [texte imprimé] / M. Maliapen, Auteur ; B. C. Dangerfield, Auteur . - 2011 . - pp. 255–264. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 255–264 Mots-clés : Clinical  pathways  System  dynamics  Decision  support  system  Diagnostic-related  groups  (DRG) Index. décimale : 001.424 Résumé : This paper examines the development of clinical pathways (CP) in a hospital in Australia based on empirical clinical data of patient episodes. A system dynamics (SD)-based decision support system is developed and analysed for this purpose. The study highlights the scenarios that will help hospital administrators to redistribute caseloads among admitting clinicians with a focus on multiple diagnostic-related groups (DRGs) as the means to improve the patient turnaround and hospital throughput without compromising quality patient care. DRGs are the best known classification system used in a casemix funding model. Casemix is a DRG-based government funding model for hospitals with a mix of performance measures aiming to reward initiatives that increase efficiencies in hospitals. The classification system groups inpatient stays into clinically meaningful categories of similar levels of complexity that consume similar amounts of resources. Policy explorations reveal various combinations of the dominant policies that hospital management can adopt. With the use of visual interfaces, executives can manipulate the DSS to test various scenarios. Experimental evidence based on focus groups demonstrated that it can enhance group learning processes and improve decision making. The findings are supported by other recent studies of CP implementation on various DRGs. These showed substantial reduction in length of stay, costs and resource utilization. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008134a.html

Analysing communication in a complex service process: an application of social network analysis in the Scottish Prison Service / P. G. Hancock in Journal of the operational research society (JORS), Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 265–274 Titre : Analysing communication in a complex service process: an application of social network analysis in the Scottish Prison Service Type de document : texte imprimé Auteurs : P. G. Hancock, Auteur ; R. Raeside, Auteur Année de publication : 2011 Article en page(s) : pp. 265–274 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Social  network  Prison  Communication  Service  process Index. décimale : 001.424 Résumé : This article utilizes social network analysis (SNA) and associated statistical techniques to examine a complex process known as Sentence Management in a Scottish Prison Service facility. Findings indicate that communication did not always follow the formal hierarchical process defined by that organization, significant fragmentation existed between certain key roles, and four central actors controlled much of the process. This research demonstrates the applicability of the SNA as an operations management tool to analyse structural communication patterns. This case study further suggests that SNA may be particularly applicable to the public service sector, to better understand informal communication networks within operations that are largely dependent on human performance. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008145a.html [article] Analysing communication in a complex service process: an application of social network analysis in the Scottish Prison Service [texte imprimé] / P. G. Hancock, Auteur ; R. Raeside, Auteur . - 2011 . - pp. 265–274. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 265–274 Mots-clés : Social  network  Prison  Communication  Service  process Index. décimale : 001.424 Résumé : This article utilizes social network analysis (SNA) and associated statistical techniques to examine a complex process known as Sentence Management in a Scottish Prison Service facility. Findings indicate that communication did not always follow the formal hierarchical process defined by that organization, significant fragmentation existed between certain key roles, and four central actors controlled much of the process. This research demonstrates the applicability of the SNA as an operations management tool to analyse structural communication patterns. This case study further suggests that SNA may be particularly applicable to the public service sector, to better understand informal communication networks within operations that are largely dependent on human performance. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008145a.html

Health network mergers and hospital re-planning / E. D. Günes in Journal of the operational research society (JORS), Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 275–283 Titre : Health network mergers and hospital re-planning Type de document : texte imprimé Auteurs : E. D. Günes, Auteur ; H. Yaman, Auteur Année de publication : 2011 Article en page(s) : pp. 275–283 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Hospital  networks  Merger  and  acquisition  Hospital  planning  Quality  constraints  Resource  allocation Index. décimale : 001.424 Résumé : This paper presents an integer programming formulation for the hospital re-planning problem which arises after hospital network mergers. The model finds the best re-allocation of resources among hospitals, the assignment of patients to hospitals and the service portfolio to minimize the system costs subject to quality and capacity constraints. An application in the Turkish hospital networks case is illustrated to show the implications of consolidation of health insurance funds on resource allocations and flow of patients in the system. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008165a.html [article] Health network mergers and hospital re-planning [texte imprimé] / E. D. Günes, Auteur ; H. Yaman, Auteur . - 2011 . - pp. 275–283. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 275–283 Mots-clés : Hospital  networks  Merger  and  acquisition  Hospital  planning  Quality  constraints  Resource  allocation Index. décimale : 001.424 Résumé : This paper presents an integer programming formulation for the hospital re-planning problem which arises after hospital network mergers. The model finds the best re-allocation of resources among hospitals, the assignment of patients to hospitals and the service portfolio to minimize the system costs subject to quality and capacity constraints. An application in the Turkish hospital networks case is illustrated to show the implications of consolidation of health insurance funds on resource allocations and flow of patients in the system. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008165a.html

Measuring brand equity in the car market: a hedonic price analysis / G. Baltas in Journal of the operational research society (JORS), Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 284–293 Titre : Measuring brand equity in the car market: a hedonic price analysis Type de document : texte imprimé Auteurs : G. Baltas, Auteur ; C. Saridakis, Auteur Année de publication : 2011 Article en page(s) : pp. 284–293 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Car  market  Brand  equity  Price  premium  Marketing Index. décimale : 001.424 Résumé : This paper designs and implements a hedonic model to investigate brand-name effects in the car market. The proposed model provides considerable empirical evidence in support of model-name premia, after controlling for observed product differentiation. Such premia incorporate not only manufacturer equity but also effects that are specific to individual models. The estimated price premia are remarkably intuitive and consistent across carmakers and models. The results yield important implications for brand and range management in the car market and suggest directions for future research. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008159a.html [article] Measuring brand equity in the car market: a hedonic price analysis [texte imprimé] / G. Baltas, Auteur ; C. Saridakis, Auteur . - 2011 . - pp. 284–293. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 284–293 Mots-clés : Car  market  Brand  equity  Price  premium  Marketing Index. décimale : 001.424 Résumé : This paper designs and implements a hedonic model to investigate brand-name effects in the car market. The proposed model provides considerable empirical evidence in support of model-name premia, after controlling for observed product differentiation. Such premia incorporate not only manufacturer equity but also effects that are specific to individual models. The estimated price premia are remarkably intuitive and consistent across carmakers and models. The results yield important implications for brand and range management in the car market and suggest directions for future research. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008159a.html

The use of simple calibrations of individual locations in making transshipment decisions in a multi-location inventory network / T. W. Archibald in Journal of the operational research society (JORS), Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 294–305 Titre : The use of simple calibrations of individual locations in making transshipment decisions in a multi-location inventory network Type de document : texte imprimé Auteurs : T. W. Archibald, Auteur ; D. P. Black, Auteur ; K. D. Glazebrook, Auteur Année de publication : 2011 Article en page(s) : pp. 294–305 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Dynamic  programming  Inventory  Stochastic  process Index. décimale : 001.424 Résumé : Demands occur at each location in a network of stock-holding retail outlets. Should a location run out of stock between successive replenishments, then subsequent demands may be met either by transshipping from another location in the network or by an emergency supply from a central depot. We deploy an approximate stochastic dynamic programming approach to develop a class of interpretable and implementable heuristics for making transshipment decisions (whether and from where to transship) which make use of simple calibrations of the candidate locations. The calibration for a location depends upon its current stock, the time to its next replenishment and the identity of the location needing stock. A numerical investigation shows strong performance of the proposed policies in comparison with standard industry practice (complete pooling, no pooling) and a recently proposed heuristic. It points to the possibility of substantial cost savings over current practice. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008127a.html [article] The use of simple calibrations of individual locations in making transshipment decisions in a multi-location inventory network [texte imprimé] / T. W. Archibald, Auteur ; D. P. Black, Auteur ; K. D. Glazebrook, Auteur . - 2011 . - pp. 294–305. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 294–305 Mots-clés : Dynamic  programming  Inventory  Stochastic  process Index. décimale : 001.424 Résumé : Demands occur at each location in a network of stock-holding retail outlets. Should a location run out of stock between successive replenishments, then subsequent demands may be met either by transshipping from another location in the network or by an emergency supply from a central depot. We deploy an approximate stochastic dynamic programming approach to develop a class of interpretable and implementable heuristics for making transshipment decisions (whether and from where to transship) which make use of simple calibrations of the candidate locations. The calibration for a location depends upon its current stock, the time to its next replenishment and the identity of the location needing stock. A numerical investigation shows strong performance of the proposed policies in comparison with standard industry practice (complete pooling, no pooling) and a recently proposed heuristic. It points to the possibility of substantial cost savings over current practice. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008127a.html

An effective recursive partitioning approach for the packing of identical rectangles in a rectangle / E. G. Birgin in Journal of the operational research society (JORS), Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 306–320 Titre : An effective recursive partitioning approach for the packing of identical rectangles in a rectangle Type de document : texte imprimé Auteurs : E. G. Birgin, Auteur ; R. D. Lobato, Auteur ; R. Morabito, Auteur Année de publication : 2011 Article en page(s) : pp. 306–320 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Cutting  and  packing  Manufacturer's  pallet  loading  problem  Woodpulp  stowage  problem  Non-guillotine  cutting  pattern  Dynamic  programming  Raster  points Index. décimale : 001.424 Résumé : In this work, we deal with the problem of packing (orthogonally and without overlapping) identical rectangles in a rectangle. This problem appears in different logistics settings, such as the loading of boxes on pallets, the arrangements of pallets in trucks and the stowing of cargo in ships. We present a recursive partitioning approach combining improved versions of a recursive five-block heuristic and an L-approach for packing rectangles into larger rectangles and L-shaped pieces. The combined approach is able to rapidly find the optimal solutions of all instances of the pallet loading problem sets Cover I and II (more than 50 000 instances). It is also effective for solving the instances of problem set Cover III (almost 100 000 instances) and practical examples of a woodpulp stowage problem, if compared to other methods from the literature. Some theoretical results are also discussed and, based on them, efficient computer implementations are introduced. The computer implementation and the data sets are available for benchmarking purposes. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008141a.html [article] An effective recursive partitioning approach for the packing of identical rectangles in a rectangle [texte imprimé] / E. G. Birgin, Auteur ; R. D. Lobato, Auteur ; R. Morabito, Auteur . - 2011 . - pp. 306–320. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 306–320 Mots-clés : Cutting  and  packing  Manufacturer's  pallet  loading  problem  Woodpulp  stowage  problem  Non-guillotine  cutting  pattern  Dynamic  programming  Raster  points Index. décimale : 001.424 Résumé : In this work, we deal with the problem of packing (orthogonally and without overlapping) identical rectangles in a rectangle. This problem appears in different logistics settings, such as the loading of boxes on pallets, the arrangements of pallets in trucks and the stowing of cargo in ships. We present a recursive partitioning approach combining improved versions of a recursive five-block heuristic and an L-approach for packing rectangles into larger rectangles and L-shaped pieces. The combined approach is able to rapidly find the optimal solutions of all instances of the pallet loading problem sets Cover I and II (more than 50 000 instances). It is also effective for solving the instances of problem set Cover III (almost 100 000 instances) and practical examples of a woodpulp stowage problem, if compared to other methods from the literature. Some theoretical results are also discussed and, based on them, efficient computer implementations are introduced. The computer implementation and the data sets are available for benchmarking purposes. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008141a.html

Capacity planning with working time accounts in services / A. Corominas in Journal of the operational research society (JORS), Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 321–331 Titre : Capacity planning with working time accounts in services Type de document : texte imprimé Auteurs : A. Corominas, Auteur ; J. Olivella, Auteur ; R. Pastor, Auteur Année de publication : 2011 Article en page(s) : pp. 321–331 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Manpower  planning  Personnel  management  Working  time  Working  time  accounts  Capacity  planning Index. décimale : 001.424 Résumé : This paper presents, formalizes and classifies working time accounts (WTAs), a means of achieving flexible production capacity through the flexible organization of working time. We propose linear programming models to plan working time, using WTA, at companies in the service industry. A computational experiment shows that the models can be solved for any capacity planning problems of reasonable size. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008166a.html [article] Capacity planning with working time accounts in services [texte imprimé] / A. Corominas, Auteur ; J. Olivella, Auteur ; R. Pastor, Auteur . - 2011 . - pp. 321–331. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 321–331 Mots-clés : Manpower  planning  Personnel  management  Working  time  Working  time  accounts  Capacity  planning Index. décimale : 001.424 Résumé : This paper presents, formalizes and classifies working time accounts (WTAs), a means of achieving flexible production capacity through the flexible organization of working time. We propose linear programming models to plan working time, using WTA, at companies in the service industry. A computational experiment shows that the models can be solved for any capacity planning problems of reasonable size. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008166a.html

Conflict analysis using Bayesian neural networks and generalized linear models / N. Iswaran in Journal of the operational research society (JORS), Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 332–341 Titre : Conflict analysis using Bayesian neural networks and generalized linear models Type de document : texte imprimé Auteurs : N. Iswaran, Auteur ; D. F. Percy, Auteur Année de publication : 2011 Article en page(s) : pp. 332–341 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Bayesian  inference  Conflict  analysis  Generalized  linear  models  Neural  networks Index. décimale : 001.424 Résumé : The study of conflict analysis has recently become more important due to current world events. Despite numerous quantitative analyses on the study of international conflict, the statistical results are often inconsistent with each other. The causes of conflict, however, are often stable and replicable when the prior probability of conflict is large. As there has been much conjecture about neural networks being able to cope with the complexity of such interconnected and interdependent data, we formulate a statistical version of a neural network model and compare the results to those of conventional statistical models. We then show how to apply Bayesian methods to the preferred model, with the aim of finding the posterior probabilities of conflict outbreak and hence being able to plan for conflict prevention. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008183a.html [article] Conflict analysis using Bayesian neural networks and generalized linear models [texte imprimé] / N. Iswaran, Auteur ; D. F. Percy, Auteur . - 2011 . - pp. 332–341. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 332–341 Mots-clés : Bayesian  inference  Conflict  analysis  Generalized  linear  models  Neural  networks Index. décimale : 001.424 Résumé : The study of conflict analysis has recently become more important due to current world events. Despite numerous quantitative analyses on the study of international conflict, the statistical results are often inconsistent with each other. The causes of conflict, however, are often stable and replicable when the prior probability of conflict is large. As there has been much conjecture about neural networks being able to cope with the complexity of such interconnected and interdependent data, we formulate a statistical version of a neural network model and compare the results to those of conventional statistical models. We then show how to apply Bayesian methods to the preferred model, with the aim of finding the posterior probabilities of conflict outbreak and hence being able to plan for conflict prevention. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008183a.html

Manufacturing costs in serial production systems with rework / G. C. Hadjinicola in Journal of the operational research society (JORS), Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 342–351 Titre : Manufacturing costs in serial production systems with rework Type de document : texte imprimé Auteurs : G. C. Hadjinicola, Auteur Année de publication : 2011 Article en page(s) : pp. 342–351 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Serial  production  systems  Rework  Markov  chains Index. décimale : 001.424 Résumé : In this paper, we present a Markovian modelling framework that can describe any serial production system with rework. Each production stage is represented by a state in the Markov chain. Absorbing states indicate the events of scrapping a product at a production stage or the completion of the finished product. Generalizable formulae for the final absorption probabilities are derived that represent: (1) the probability that an unfinished product is scrapped at a certain production stage and (2) the yield of the system. We also derive various expected costs and quantities associated with all products ending in any absorbing state, as well as the equivalent costs and quantities for finished products. The applicability of our modelling framework is demonstrated in a real-life manufacturing environment in the food-packing industry. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008186a.html [article] Manufacturing costs in serial production systems with rework [texte imprimé] / G. C. Hadjinicola, Auteur . - 2011 . - pp. 342–351. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 61 N° 2 (Fevrier 2010) . - pp. 342–351 Mots-clés : Serial  production  systems  Rework  Markov  chains Index. décimale : 001.424 Résumé : In this paper, we present a Markovian modelling framework that can describe any serial production system with rework. Each production stage is represented by a state in the Markov chain. Absorbing states indicate the events of scrapping a product at a production stage or the completion of the finished product. Generalizable formulae for the final absorption probabilities are derived that represent: (1) the probability that an unfinished product is scrapped at a certain production stage and (2) the yield of the system. We also derive various expected costs and quantities associated with all products ending in any absorbing state, as well as the equivalent costs and quantities for finished products. The applicability of our modelling framework is demonstrated in a real-life manufacturing environment in the food-packing industry. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n2/abs/jors2008186a.html

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