Dépouillements

The economics of a closed-loop supply chain with remanufacturing / J-M. Chen in Journal of the operational research society (JORS), Vol. 63 N° 10 (Octobre 2012) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1323–1335 Titre : The economics of a closed-loop supply chain with remanufacturing Type de document : texte imprimé Auteurs : J-M. Chen, Auteur ; C.-I. Chang, Auteur Année de publication : 2012 Article en page(s) : pp. 1323–1335 Note générale : operational research Langues : Anglais (eng) Mots-clés : decision  analysis;  logistics;  closed-loop  supply  chain;  remanufacturing;  newsvendor Index. décimale : 001.424 Résumé : This study deals with joint decisions on pricing and production lot-sizing in a closed-loop supply chain consisting of manufacturing and remanufacturing operations. This study emphasizes the economic analysis of this hybrid system with substitution between the new and the remanufactured versions of the same product. We develop analytical models under a newsvendor framework bearing the following questions in mind. Can a hybrid system operate cost-effectively? Can it outperform the manufacturing-only system? If yes, to what extent and under what conditions? If not, what are the key factors that cause underperformance? This study formulates a multi-variable optimization problem and performs mathematical and numerical analysis. Results show that the hybrid system does not outperform the manufacturing-only system under a generic setting, but achieves better performance under conditions with a higher degree of substitution and/or a lower remanufacturing cost. In this scenario, participating in remanufacturing is not only an issue of environmental responsibility, but a profit-boosting option. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011142a.html [article] The economics of a closed-loop supply chain with remanufacturing [texte imprimé] / J-M. Chen, Auteur ; C.-I. Chang, Auteur . - 2012 . - pp. 1323–1335. operational research Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1323–1335 Mots-clés : decision  analysis;  logistics;  closed-loop  supply  chain;  remanufacturing;  newsvendor Index. décimale : 001.424 Résumé : This study deals with joint decisions on pricing and production lot-sizing in a closed-loop supply chain consisting of manufacturing and remanufacturing operations. This study emphasizes the economic analysis of this hybrid system with substitution between the new and the remanufactured versions of the same product. We develop analytical models under a newsvendor framework bearing the following questions in mind. Can a hybrid system operate cost-effectively? Can it outperform the manufacturing-only system? If yes, to what extent and under what conditions? If not, what are the key factors that cause underperformance? This study formulates a multi-variable optimization problem and performs mathematical and numerical analysis. Results show that the hybrid system does not outperform the manufacturing-only system under a generic setting, but achieves better performance under conditions with a higher degree of substitution and/or a lower remanufacturing cost. In this scenario, participating in remanufacturing is not only an issue of environmental responsibility, but a profit-boosting option. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011142a.html

Dynamic simultaneous fare proration for large-scale network revenue management / P. Kemmer in Journal of the operational research society (JORS), Vol. 63 N° 10 (Octobre 2012) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1336–1350 Titre : Dynamic simultaneous fare proration for large-scale network revenue management Type de document : texte imprimé Auteurs : P. Kemmer, Auteur ; A. K. Strauss, Auteur ; T. Winter, Auteur Année de publication : 2012 Article en page(s) : pp. 1336–1350 Note générale : operational research Langues : Anglais (eng) Mots-clés : transport;  revenue  management;  dynamic  programming;  air  transport Index. décimale : 001.424 Résumé : Network revenue management is concerned with managing demand for products that require inventory from one or several resources by controlling product availability and/or prices in order to maximize expected revenues subject to the available resource capacities. One can tackle this problem by decomposing it into resource-level subproblems that can be solved efficiently, for example by dynamic programming. We propose a new dynamic fare proration method specifically having large-scale applications in mind. It decomposes the network problem by fare proration and solves the resource-level dynamic programs simultaneously using simple, endogenously obtained dynamic marginal capacity value estimates to update fare prorations over time. An extensive numerical simulation study demonstrates that the method results in tightened upper bounds on the optimal expected revenue, and that the obtained policies are very effective with regard to achieved revenues and required runtime. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011143a.html [article] Dynamic simultaneous fare proration for large-scale network revenue management [texte imprimé] / P. Kemmer, Auteur ; A. K. Strauss, Auteur ; T. Winter, Auteur . - 2012 . - pp. 1336–1350. operational research Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1336–1350 Mots-clés : transport;  revenue  management;  dynamic  programming;  air  transport Index. décimale : 001.424 Résumé : Network revenue management is concerned with managing demand for products that require inventory from one or several resources by controlling product availability and/or prices in order to maximize expected revenues subject to the available resource capacities. One can tackle this problem by decomposing it into resource-level subproblems that can be solved efficiently, for example by dynamic programming. We propose a new dynamic fare proration method specifically having large-scale applications in mind. It decomposes the network problem by fare proration and solves the resource-level dynamic programs simultaneously using simple, endogenously obtained dynamic marginal capacity value estimates to update fare prorations over time. An extensive numerical simulation study demonstrates that the method results in tightened upper bounds on the optimal expected revenue, and that the obtained policies are very effective with regard to achieved revenues and required runtime. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011143a.html

The dynamics of brand equity / L von Auer in Journal of the operational research society (JORS), Vol. 63 N° 10 (Octobre 2012) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1351–1362 Titre : The dynamics of brand equity : a hedonic regression approach to the laser printer market Type de document : texte imprimé Auteurs : L von Auer, Auteur ; M. Trede, Auteur Année de publication : 2012 Article en page(s) : pp. 1351–1362 Note générale : operational research Langues : Anglais (eng) Mots-clés : laser  printer  market;  brand  equity;  price  premium;  hedonic  regression;  Bayesian  estimation;  dynamic  linear  model Index. décimale : 001.424 Résumé : The authors develop a dynamic hedonic regression approach to measuring the evolution of a comparative brand premium (pairwise price difference between two products that are identical in all respects apart from the brand). In contrast to existing approaches, the proposed Bayesian estimation method exploits the premia's intertemporal dependence structure, resulting in a higher level of accuracy of the estimated time paths of the brand premia. In addition, the authors present a novel, but straightforward way to construct confidence bands that cover the entire time series of brand premia with high probability. The authors apply their approach to a large, detailed data set on laser printers, which was gathered on a monthly basis over a 4-year period. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors201145a.html [article] The dynamics of brand equity : a hedonic regression approach to the laser printer market [texte imprimé] / L von Auer, Auteur ; M. Trede, Auteur . - 2012 . - pp. 1351–1362. operational research Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1351–1362 Mots-clés : laser  printer  market;  brand  equity;  price  premium;  hedonic  regression;  Bayesian  estimation;  dynamic  linear  model Index. décimale : 001.424 Résumé : The authors develop a dynamic hedonic regression approach to measuring the evolution of a comparative brand premium (pairwise price difference between two products that are identical in all respects apart from the brand). In contrast to existing approaches, the proposed Bayesian estimation method exploits the premia's intertemporal dependence structure, resulting in a higher level of accuracy of the estimated time paths of the brand premia. In addition, the authors present a novel, but straightforward way to construct confidence bands that cover the entire time series of brand premia with high probability. The authors apply their approach to a large, detailed data set on laser printers, which was gathered on a monthly basis over a 4-year period. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors201145a.html

When do armed revolts succeed / M. P. Atkinson in Journal of the operational research society (JORS), Vol. 63 N° 10 (Octobre 2012) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1363–1373 Titre : When do armed revolts succeed : lessons from Lanchester theory Type de document : texte imprimé Auteurs : M. P. Atkinson, Auteur ; A. Gutfraind, Auteur ; M. Kress, Auteur Année de publication : 2012 Article en page(s) : pp. 1363–1373 Note générale : operational research Langues : Anglais (eng) Mots-clés : conflict  analysis;  defence  studies;  system  dynamics;  population;  behaviour Index. décimale : 001.424 Résumé : Major revolts have recently erupted in parts of the Middle East with substantial international repercussions. Predicting, coping with and winning those revolts have become a grave problem for many regimes and for world powers. We propose a new model of such revolts that describes their evolution by building on the classic Lanchester theory of combat. The model accounts for the split in the population between those loyal to the regime and those favouring the rebels. We show that, contrary to classical Lanchesterian insights regarding traditional force-on-force engagements, the outcome of a revolt is independent of the initial force sizes; it only depends on the fraction of the population supporting each side and their combat effectiveness. The model's predictions are consistent with the situations currently observed in Afghanistan, Libya and Syria (September 2011), and it points to how those situations might evolve. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011146a.html [article] When do armed revolts succeed : lessons from Lanchester theory [texte imprimé] / M. P. Atkinson, Auteur ; A. Gutfraind, Auteur ; M. Kress, Auteur . - 2012 . - pp. 1363–1373. operational research Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1363–1373 Mots-clés : conflict  analysis;  defence  studies;  system  dynamics;  population;  behaviour Index. décimale : 001.424 Résumé : Major revolts have recently erupted in parts of the Middle East with substantial international repercussions. Predicting, coping with and winning those revolts have become a grave problem for many regimes and for world powers. We propose a new model of such revolts that describes their evolution by building on the classic Lanchester theory of combat. The model accounts for the split in the population between those loyal to the regime and those favouring the rebels. We show that, contrary to classical Lanchesterian insights regarding traditional force-on-force engagements, the outcome of a revolt is independent of the initial force sizes; it only depends on the fraction of the population supporting each side and their combat effectiveness. The model's predictions are consistent with the situations currently observed in Afghanistan, Libya and Syria (September 2011), and it points to how those situations might evolve. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011146a.html

Bound and collapse Bayesian reject inference for credit scoring / G. G. Chen in Journal of the operational research society (JORS), Vol. 63 N° 10 (Octobre 2012) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1374–1387 Titre : Bound and collapse Bayesian reject inference for credit scoring Type de document : texte imprimé Auteurs : G. G. Chen, Auteur ; T. Åstebro, Auteur Année de publication : 2012 Article en page(s) : pp. 1374–1387 Note générale : operational research Langues : Anglais (eng) Mots-clés : statistics;  credit  scoring;  Bayesian;  reject  inference;  missing  data Index. décimale : 001.424 Résumé : Reject inference is a method for inferring how a rejected credit applicant would have behaved had credit been granted. Credit-quality data on rejected applicants are usually missing not at random (MNAR). In order to infer credit-quality data MNAR, we propose a flexible method to generate the probability of missingness within a model-based bound and collapse Bayesian technique. We tested the method's performance relative to traditional reject-inference methods using real data. Results show that our method improves the classification power of credit scoring models under MNAR conditions. Note de contenu : In an earlier version of this article the title was incorrect. The correct title is shown in this final version of the article. Corrected online: 12 January 2012 DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011149a.html [article] Bound and collapse Bayesian reject inference for credit scoring [texte imprimé] / G. G. Chen, Auteur ; T. Åstebro, Auteur . - 2012 . - pp. 1374–1387. operational research Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1374–1387 Mots-clés : statistics;  credit  scoring;  Bayesian;  reject  inference;  missing  data Index. décimale : 001.424 Résumé : Reject inference is a method for inferring how a rejected credit applicant would have behaved had credit been granted. Credit-quality data on rejected applicants are usually missing not at random (MNAR). In order to infer credit-quality data MNAR, we propose a flexible method to generate the probability of missingness within a model-based bound and collapse Bayesian technique. We tested the method's performance relative to traditional reject-inference methods using real data. Results show that our method improves the classification power of credit scoring models under MNAR conditions. Note de contenu : In an earlier version of this article the title was incorrect. The correct title is shown in this final version of the article. Corrected online: 12 January 2012 DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011149a.html

Developments in time preference and their implications for medical decision making / A. E. Attema in Journal of the operational research society (JORS), Vol. 63 N° 10 (Octobre 2012) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1388–1399 Titre : Developments in time preference and their implications for medical decision making Type de document : texte imprimé Auteurs : A. E. Attema, Auteur Année de publication : 2012 Article en page(s) : pp. 1388–1399 Note générale : operational research Langues : Anglais (eng) Mots-clés : behaviour;  decision  analysis;  medicine;  methodology;  time  preference Index. décimale : 001.424 Résumé : The field of time preference is developing rapidly. It concerns important concepts for many economic issues. One important domain of application is health economics. This paper reviews several empirical and theoretical developments for time preference with special attention to the health economics field. In addition, the implications for medical decision making, long-term health-care planning and health economic evaluation are discussed. Recognition of this empirical evidence in health-care policy making is recommended, as well as a more transparent process of the framing and analysis of, and deliberation on, public policy. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011137a.html [article] Developments in time preference and their implications for medical decision making [texte imprimé] / A. E. Attema, Auteur . - 2012 . - pp. 1388–1399. operational research Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1388–1399 Mots-clés : behaviour;  decision  analysis;  medicine;  methodology;  time  preference Index. décimale : 001.424 Résumé : The field of time preference is developing rapidly. It concerns important concepts for many economic issues. One important domain of application is health economics. This paper reviews several empirical and theoretical developments for time preference with special attention to the health economics field. In addition, the implications for medical decision making, long-term health-care planning and health economic evaluation are discussed. Recognition of this empirical evidence in health-care policy making is recommended, as well as a more transparent process of the framing and analysis of, and deliberation on, public policy. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011137a.html

Reputation-based winner determination problem for combinatorial transportation procurement auctions / M. Rekik in Journal of the operational research society (JORS), Vol. 63 N° 10 (Octobre 2012) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1400–1409 Titre : Reputation-based winner determination problem for combinatorial transportation procurement auctions Type de document : texte imprimé Auteurs : M. Rekik, Auteur ; S. Mellouli, Auteur Année de publication : 2012 Article en page(s) : pp. 1400–1409 Note générale : operational research Langues : Anglais (eng) Mots-clés : winner  determination  problem;  carrier  reputation;  transportation  procurement;  combinatorial  auctions Index. décimale : 001.424 Résumé : This paper proposes a reputation-based winner determination problem for transportation procurement auctions where the allocation of long-term contracts to carriers is decided with respect to both bid ask-prices and carriers reputation. The objective is to manage the trade-off between transport costs and the quality of service during operations. Carriers reputation is translated into unexpected hidden cost that represents the possible additional cost that the shipper may incur when dealing with a set of winning carriers. This cost depends essentially on the carriers reputation as evaluated by the shipper running the auction. To evaluate carriers reputations, the shipper uses a number of service attributes with different weights depending on shipping contracts. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011108a.html [article] Reputation-based winner determination problem for combinatorial transportation procurement auctions [texte imprimé] / M. Rekik, Auteur ; S. Mellouli, Auteur . - 2012 . - pp. 1400–1409. operational research Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1400–1409 Mots-clés : winner  determination  problem;  carrier  reputation;  transportation  procurement;  combinatorial  auctions Index. décimale : 001.424 Résumé : This paper proposes a reputation-based winner determination problem for transportation procurement auctions where the allocation of long-term contracts to carriers is decided with respect to both bid ask-prices and carriers reputation. The objective is to manage the trade-off between transport costs and the quality of service during operations. Carriers reputation is translated into unexpected hidden cost that represents the possible additional cost that the shipper may incur when dealing with a set of winning carriers. This cost depends essentially on the carriers reputation as evaluated by the shipper running the auction. To evaluate carriers reputations, the shipper uses a number of service attributes with different weights depending on shipping contracts. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011108a.html

A scenario generation-based lower bounding approach for stochastic scheduling problems / L. Liao in Journal of the operational research society (JORS), Vol. 63 N° 10 (Octobre 2012) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1410–1420 Titre : A scenario generation-based lower bounding approach for stochastic scheduling problems Type de document : texte imprimé Auteurs : L. Liao, Auteur ; S. C. Sarin, Auteur ; Sherali, H. D., Auteur Année de publication : 2012 Article en page(s) : pp. 1410–1420 Langues : Anglais (eng) Mots-clés : scheduling;  stochastic  programming;  scenario  generation;  discrete  bounding;  total  weighted  tardiness Index. décimale : 001.424 Résumé : In this paper, we investigate scenario generation methods to establish lower bounds on the optimal objective value for stochastic scheduling problems that contain random parameters with continuous distributions. In contrast to the Sample Average Approximation (SAA) approach, which yields probabilistic bound values, we use an alternative bounding method that relies on the ideas of discrete bounding and recursive stratified sampling. Theoretical support is provided for deriving exact lower bounds for both expectation and conditional value-at-risk objectives. We illustrate the use of our method on the single machine total weighted tardiness problem. The results of our numerical investigation demonstrate good properties of our bounding method, compared with the SAA method and an earlier discrete bounding method. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011150a.html [article] A scenario generation-based lower bounding approach for stochastic scheduling problems [texte imprimé] / L. Liao, Auteur ; S. C. Sarin, Auteur ; Sherali, H. D., Auteur . - 2012 . - pp. 1410–1420. Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1410–1420 Mots-clés : scheduling;  stochastic  programming;  scenario  generation;  discrete  bounding;  total  weighted  tardiness Index. décimale : 001.424 Résumé : In this paper, we investigate scenario generation methods to establish lower bounds on the optimal objective value for stochastic scheduling problems that contain random parameters with continuous distributions. In contrast to the Sample Average Approximation (SAA) approach, which yields probabilistic bound values, we use an alternative bounding method that relies on the ideas of discrete bounding and recursive stratified sampling. Theoretical support is provided for deriving exact lower bounds for both expectation and conditional value-at-risk objectives. We illustrate the use of our method on the single machine total weighted tardiness problem. The results of our numerical investigation demonstrate good properties of our bounding method, compared with the SAA method and an earlier discrete bounding method. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011150a.html

A revenue management approach to address a truck rental problem / S. Benigno in Journal of the operational research society (JORS), Vol. 63 N° 10 (Octobre 2012) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1421–1433 Titre : A revenue management approach to address a truck rental problem Type de document : texte imprimé Auteurs : S. Benigno, Auteur ; F. Guerriero, Auteur ; G. Miglionico, Auteur Année de publication : 2012 Article en page(s) : pp. 1421–1433 Note générale : operational research Langues : Anglais (eng) Mots-clés : dynamic  programming  optimization;  transportation  problem;  revenue  management;  integer  linear  programming;  nonlinear  model Index. décimale : 001.424 Résumé : This paper describes an application of revenue management techniques and policies in the field of logistics and distribution. In particular, the problem of transportation operators, who offer products for hire, is considered. A product is a truck of a given capacity, which can be rented for one or several time periods, throughout a multi-period planning horizon. The logistic operator can satisfy the demand of a given product with trucks with a capacity greater than that initially required, that is an ‘upgrade’ can take place. In this context, the logistic operator has to decide whether to accept or reject a request and which type of truck should be used to address it. For this purpose, a dynamic programming (DP) formulation of the problem under consideration is devised. The ‘course of dimensionality’ leads to the necessity of introducing different mathematical programming models to represent the problem. The mathematical models we presented are an extension of the well-known approximations for the DP of traditional network capacity management analysis. Based on these models and exploiting revenue management concepts, primal and dual acceptance policies are developed and compared in a computational study. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011138a.html [article] A revenue management approach to address a truck rental problem [texte imprimé] / S. Benigno, Auteur ; F. Guerriero, Auteur ; G. Miglionico, Auteur . - 2012 . - pp. 1421–1433. operational research Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1421–1433 Mots-clés : dynamic  programming  optimization;  transportation  problem;  revenue  management;  integer  linear  programming;  nonlinear  model Index. décimale : 001.424 Résumé : This paper describes an application of revenue management techniques and policies in the field of logistics and distribution. In particular, the problem of transportation operators, who offer products for hire, is considered. A product is a truck of a given capacity, which can be rented for one or several time periods, throughout a multi-period planning horizon. The logistic operator can satisfy the demand of a given product with trucks with a capacity greater than that initially required, that is an ‘upgrade’ can take place. In this context, the logistic operator has to decide whether to accept or reject a request and which type of truck should be used to address it. For this purpose, a dynamic programming (DP) formulation of the problem under consideration is devised. The ‘course of dimensionality’ leads to the necessity of introducing different mathematical programming models to represent the problem. The mathematical models we presented are an extension of the well-known approximations for the DP of traditional network capacity management analysis. Based on these models and exploiting revenue management concepts, primal and dual acceptance policies are developed and compared in a computational study. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011138a.html

A smuggling game with asymmetrical information of players / R. Hohzaki in Journal of the operational research society (JORS), Vol. 63 N° 10 (Octobre 2012) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1434–1446 Titre : A smuggling game with asymmetrical information of players Type de document : texte imprimé Auteurs : R. Hohzaki, Auteur ; R. Masuda, Auteur Année de publication : 2012 Article en page(s) : pp. 1434–1446 Note générale : operational research Langues : Anglais (eng) Mots-clés : game  theory;  linear  programming;  military;  decision  analysis Index. décimale : 001.424 Résumé : This paper deals with a smuggling game with multiple stages. Customs is allowed to patrol within the limited number of chances and obtain reward by the capture of a smuggler. The smuggler gets a reward depending on the amount of contraband he succeeds to ship in smuggling at each stage. The pay-off of the game is zero-sum. In almost all past studies, they adopt the alternative of smuggling or non-smuggling as the smuggler's strategy. From the point of view of information, some researchers assumed that both players could observe their opponent's behaviour at the past stage or a few assumed that both players had no information about their opponent. Other than these types of smuggling games with the symmetric information, we introduce the asymmetrical acquisition of information or the concept of perfect Bayesian equilibrium in the smuggling game for the first time. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011161a.html [article] A smuggling game with asymmetrical information of players [texte imprimé] / R. Hohzaki, Auteur ; R. Masuda, Auteur . - 2012 . - pp. 1434–1446. operational research Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1434–1446 Mots-clés : game  theory;  linear  programming;  military;  decision  analysis Index. décimale : 001.424 Résumé : This paper deals with a smuggling game with multiple stages. Customs is allowed to patrol within the limited number of chances and obtain reward by the capture of a smuggler. The smuggler gets a reward depending on the amount of contraband he succeeds to ship in smuggling at each stage. The pay-off of the game is zero-sum. In almost all past studies, they adopt the alternative of smuggling or non-smuggling as the smuggler's strategy. From the point of view of information, some researchers assumed that both players could observe their opponent's behaviour at the past stage or a few assumed that both players had no information about their opponent. Other than these types of smuggling games with the symmetric information, we introduce the asymmetrical acquisition of information or the concept of perfect Bayesian equilibrium in the smuggling game for the first time. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011161a.html

An exact method for minimizing the total treatment time in intensity-modulated radiotherapy / L. R. Mason in Journal of the operational research society (JORS), Vol. 63 N° 10 (Octobre 2012) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1447–1456 Titre : An exact method for minimizing the total treatment time in intensity-modulated radiotherapy Type de document : texte imprimé Auteurs : L. R. Mason, Auteur ; V. H. Mak-Hau, Auteur ; A. T. Ernst, Auteur Année de publication : 2012 Article en page(s) : pp. 1447–1456 Note générale : operational research Langues : Anglais (eng) Mots-clés : integer  programming;  combinatorial  optimization;  constraint  programming Index. décimale : 001.424 Résumé : In this paper, we solve a combinatorial optimization problem that arises from the treatment planning of a type of radiotherapy where intensity is modulated by multileaf collimators (MLC) in a step-and-shoot manner. In Ernst et al [INFORMS Journal on Computing 21 (4) (2009): 562–574], we proposed an exact method for minimizing the number of MLC apertures needed for a treatment. Our method outperformed the fastest algorithms available at the time. We refer to our method as the CPI method. We now attempt to minimize the total treatment time by modifying our CPI method. This modification involves non-trivial work, as some of the search space elimination schemes used in the CPI method cannot be applied in here. In our numerical experiments, we again compare our new method with the fastest algorithms currently available. There has been significant recent research in this area; hence we compare our method with those published in Wake et al [Computers and Operations Research 36 (2009): 795–810], Taşkin et al [Operations Research 58 (3) (2010): 674–690] and Cambazard et al [CPAIRO (2010): 1–16]. The numerical comparisons indicate that our method generally outperformed the first two, while being competitive with the third. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011158a.html [article] An exact method for minimizing the total treatment time in intensity-modulated radiotherapy [texte imprimé] / L. R. Mason, Auteur ; V. H. Mak-Hau, Auteur ; A. T. Ernst, Auteur . - 2012 . - pp. 1447–1456. operational research Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1447–1456 Mots-clés : integer  programming;  combinatorial  optimization;  constraint  programming Index. décimale : 001.424 Résumé : In this paper, we solve a combinatorial optimization problem that arises from the treatment planning of a type of radiotherapy where intensity is modulated by multileaf collimators (MLC) in a step-and-shoot manner. In Ernst et al [INFORMS Journal on Computing 21 (4) (2009): 562–574], we proposed an exact method for minimizing the number of MLC apertures needed for a treatment. Our method outperformed the fastest algorithms available at the time. We refer to our method as the CPI method. We now attempt to minimize the total treatment time by modifying our CPI method. This modification involves non-trivial work, as some of the search space elimination schemes used in the CPI method cannot be applied in here. In our numerical experiments, we again compare our new method with the fastest algorithms currently available. There has been significant recent research in this area; hence we compare our method with those published in Wake et al [Computers and Operations Research 36 (2009): 795–810], Taşkin et al [Operations Research 58 (3) (2010): 674–690] and Cambazard et al [CPAIRO (2010): 1–16]. The numerical comparisons indicate that our method generally outperformed the first two, while being competitive with the third. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011158a.html

Exploring alternative routes to realising the benefits of simulation in healthcare / J. Bowers in Journal of the operational research society (JORS), Vol. 63 N° 10 (Octobre 2012) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1457–1466 Titre : Exploring alternative routes to realising the benefits of simulation in healthcare Type de document : texte imprimé Auteurs : J. Bowers, Auteur ; M. Ghattas, Auteur ; G. Mould, Auteur Année de publication : 2012 Article en page(s) : pp. 1457–1466 Note générale : operational research Langues : Anglais (eng) Mots-clés : health  service;  emergency  departments;  simulation Index. décimale : 001.424 Résumé : Discrete event simulation should offer numerous benefits in designing healthcare systems but the reality is often problematic. Healthcare modelling faces particular challenges: genuine, fundamental variations in practice and an opposition to any suggestion of standardisation from some professional groups. This paper compares the experiences of developing a new simulation in an Accident and Emergency (A&E) Department, a subsequent adaptation for modelling an outpatient clinic and applications of a generic A&E simulation. These studies provide examples of three distinct approaches to realising the potential benefits of simulation: the bespoke, the reuse and the generic route. Reuse has many advantages: it is relatively efficient in exploiting previous modelling experience, delivering timely results although providing scope for adaptations to local practice. Explicitly demonstrating this willingness to adapt to local conditions and engaging with stakeholders is particularly important in healthcare simulation. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011127a.html [article] Exploring alternative routes to realising the benefits of simulation in healthcare [texte imprimé] / J. Bowers, Auteur ; M. Ghattas, Auteur ; G. Mould, Auteur . - 2012 . - pp. 1457–1466. operational research Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1457–1466 Mots-clés : health  service;  emergency  departments;  simulation Index. décimale : 001.424 Résumé : Discrete event simulation should offer numerous benefits in designing healthcare systems but the reality is often problematic. Healthcare modelling faces particular challenges: genuine, fundamental variations in practice and an opposition to any suggestion of standardisation from some professional groups. This paper compares the experiences of developing a new simulation in an Accident and Emergency (A&E) Department, a subsequent adaptation for modelling an outpatient clinic and applications of a generic A&E simulation. These studies provide examples of three distinct approaches to realising the potential benefits of simulation: the bespoke, the reuse and the generic route. Reuse has many advantages: it is relatively efficient in exploiting previous modelling experience, delivering timely results although providing scope for adaptations to local practice. Explicitly demonstrating this willingness to adapt to local conditions and engaging with stakeholders is particularly important in healthcare simulation. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011127a.html

Planning performance based contracts considering reliability and uncertain system usage / T. Jin in Journal of the operational research society (JORS), Vol. 63 N° 10 (Octobre 2012) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1467–1478 Titre : Planning performance based contracts considering reliability and uncertain system usage Type de document : texte imprimé Auteurs : T. Jin, Auteur ; P. Wang, Auteur Année de publication : 2012 Article en page(s) : pp. 1467–1478 Note générale : operational research Langues : Anglais (eng) Mots-clés : reliability;  service  parts  logistics;  performance  based  contracting;  performance-based  outcome;  post-production  support;  power  by  the  hour Index. décimale : 001.424 Résumé : This paper investigates a novel quantitative approach for planning and contracting performance-based logistics in the presence of uncertain system usage. Our efforts focus on an integrated service delivery environment where the manufacturer develops capital-intensive systems and also provides after-sales support. We propose an analytical model to characterize system operational availability by comprehending five performance drivers: inherent failure rate, usage rate, spare parts inventory, repair time, and the fleet size. This analytical insight into the system performance allows the service supplier to minimize the total cost across system design, production, maintenance, and repair. Two contracting schemes are investigated under cost minimization and profit maximization schemes. For the first time in literature, reliability design and service parts logistics are seamlessly integrated into one decision support model for improving operational availability while lowering the lifecycle cost. Numerical examples are provided to demonstrate the applicability and the effectiveness of the proposed decision support tool. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011144a.html [article] Planning performance based contracts considering reliability and uncertain system usage [texte imprimé] / T. Jin, Auteur ; P. Wang, Auteur . - 2012 . - pp. 1467–1478. operational research Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1467–1478 Mots-clés : reliability;  service  parts  logistics;  performance  based  contracting;  performance-based  outcome;  post-production  support;  power  by  the  hour Index. décimale : 001.424 Résumé : This paper investigates a novel quantitative approach for planning and contracting performance-based logistics in the presence of uncertain system usage. Our efforts focus on an integrated service delivery environment where the manufacturer develops capital-intensive systems and also provides after-sales support. We propose an analytical model to characterize system operational availability by comprehending five performance drivers: inherent failure rate, usage rate, spare parts inventory, repair time, and the fleet size. This analytical insight into the system performance allows the service supplier to minimize the total cost across system design, production, maintenance, and repair. Two contracting schemes are investigated under cost minimization and profit maximization schemes. For the first time in literature, reliability design and service parts logistics are seamlessly integrated into one decision support model for improving operational availability while lowering the lifecycle cost. Numerical examples are provided to demonstrate the applicability and the effectiveness of the proposed decision support tool. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011144a.html

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