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Journal of the operational research society (JORS) |
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Ajouter le résultat dans votre panierSurvey of cooperative inventory games and extensions / Dror, M. in Journal of the operational research society (JORS), Vol. 62 N° 4 (Avril 2011)
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 565–580
Titre : Survey of cooperative inventory games and extensions Type de document : texte imprimé Auteurs : Dror, M., Auteur ; Hartman, B. C., Auteur Année de publication : 2011 Article en page(s) : pp. 565–580 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Cooperative games Inventory games Production games Index. décimale : 001.424 Résumé : We examine cooperative games in supply-chain management termed Inventory Games. Supply-chain management has non-cooperative and cooperative interactions between the participating players. We provide a concise survey of cooperative inventory games in the form of extensions on two basic problems. For deterministic games, Economic Order Quantity-like policies with joint replenishment are of primary interest. For stochastic games we examine Newsvendor-like centralization games and their extensions. We conclude with a short summary of a dynamic Newsvendor realization game and directions for further research. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors201065a.html [article] Survey of cooperative inventory games and extensions [texte imprimé] / Dror, M., Auteur ; Hartman, B. C., Auteur . - 2011 . - pp. 565–580.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 565–580
Mots-clés : Cooperative games Inventory games Production games Index. décimale : 001.424 Résumé : We examine cooperative games in supply-chain management termed Inventory Games. Supply-chain management has non-cooperative and cooperative interactions between the participating players. We provide a concise survey of cooperative inventory games in the form of extensions on two basic problems. For deterministic games, Economic Order Quantity-like policies with joint replenishment are of primary interest. For stochastic games we examine Newsvendor-like centralization games and their extensions. We conclude with a short summary of a dynamic Newsvendor realization game and directions for further research. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors201065a.html
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 581–592
Titre : Collaboration for a two-echelon supply chain in the pulp and paper industry Type de document : texte imprimé Auteurs : Lehoux, N., Auteur ; D'Amours, S., Auteur ; Frein, Y., Auteur Année de publication : 2011 Article en page(s) : pp. 581–592 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Logistics Linear programming Forestry Enterprise collaboration Index. décimale : 001.424 Résumé : In our research, we study the case of a pulp and paper producer who decides to establish a partnership with one buyer. Using two different types of relationship, namely a traditional system without any collaboration scheme and Collaborative Planning, Forecasting and Replenishment, we develop decision models describing the producer and the buyer planning processes. We also identify which approach is more profitable for each actor as well as for the network, based on real costs and parameters obtained from the industrial case. We then test how different incentives can improve the traditional system and provide higher gains for each partner. Our results show that using incentives increases the system's profit by up to 4% if parameters are well defined. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors2009167a.html [article] Collaboration for a two-echelon supply chain in the pulp and paper industry [texte imprimé] / Lehoux, N., Auteur ; D'Amours, S., Auteur ; Frein, Y., Auteur . - 2011 . - pp. 581–592.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 581–592
Mots-clés : Logistics Linear programming Forestry Enterprise collaboration Index. décimale : 001.424 Résumé : In our research, we study the case of a pulp and paper producer who decides to establish a partnership with one buyer. Using two different types of relationship, namely a traditional system without any collaboration scheme and Collaborative Planning, Forecasting and Replenishment, we develop decision models describing the producer and the buyer planning processes. We also identify which approach is more profitable for each actor as well as for the network, based on real costs and parameters obtained from the industrial case. We then test how different incentives can improve the traditional system and provide higher gains for each partner. Our results show that using incentives increases the system's profit by up to 4% if parameters are well defined. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors2009167a.html
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 593–607
Titre : Iterative algorithms for the curfew planning problem Type de document : texte imprimé Auteurs : Bog, S., Auteur ; Nemani, A. K., Auteur ; Ahuja, R. K., Auteur Année de publication : 2011 Article en page(s) : pp. 593–607 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Rail track maintenance Scheduling Network disruptions Discrete optimization Heuristics Index. décimale : 001.424 Résumé : The curfew planning problem is to design an annual timetable for railway track maintenance teams. Each team is capable of handling certain types of repairs and replacement jobs. The jobs are combined into a set of projects according to their locations and types. The timetable shows which project should be worked on by each team on a weekly basis throughout an entire year. Our objective is to design a schedule with minimum network disruption due to ongoing maintenance projects that require absolute curfew. Absolute curfew projects are those that cause complete closure of the rail traffic. For tackling this problem, we develop four optimization-based iterative algorithms. We also present very promising computational results obtained within a few minutes using data provided by a major North American railroad. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors20101a.html [article] Iterative algorithms for the curfew planning problem [texte imprimé] / Bog, S., Auteur ; Nemani, A. K., Auteur ; Ahuja, R. K., Auteur . - 2011 . - pp. 593–607.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 593–607
Mots-clés : Rail track maintenance Scheduling Network disruptions Discrete optimization Heuristics Index. décimale : 001.424 Résumé : The curfew planning problem is to design an annual timetable for railway track maintenance teams. Each team is capable of handling certain types of repairs and replacement jobs. The jobs are combined into a set of projects according to their locations and types. The timetable shows which project should be worked on by each team on a weekly basis throughout an entire year. Our objective is to design a schedule with minimum network disruption due to ongoing maintenance projects that require absolute curfew. Absolute curfew projects are those that cause complete closure of the rail traffic. For tackling this problem, we develop four optimization-based iterative algorithms. We also present very promising computational results obtained within a few minutes using data provided by a major North American railroad. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors20101a.html
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 608–615
Titre : Technology credit rating system for funding SMEs Type de document : texte imprimé Auteurs : Moon, T. H., Auteur ; Kim, Y., Auteur ; Sohn, S. Y., Auteur Année de publication : 2011 Article en page(s) : pp. 608–615 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Technology rating Technology evaluation Small and medium enterprises Index. décimale : 001.424 Résumé : Technology evaluation has played a crucial role in selecting and supporting companies with innovative technology. Previous studies have focused on developing technology evaluation methods such as scorecard. However, technology credit rating is rarely applied, despite its convenient usage for technology financing. In this paper, we propose a technology credit rating system, called cross matrix, based on empirical data obtained from the technology scoring model and examine their properties. The proposed rating system is expected to provide valuable information for effective management of the technology credit fund. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors201015a.html [article] Technology credit rating system for funding SMEs [texte imprimé] / Moon, T. H., Auteur ; Kim, Y., Auteur ; Sohn, S. Y., Auteur . - 2011 . - pp. 608–615.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 608–615
Mots-clés : Technology rating Technology evaluation Small and medium enterprises Index. décimale : 001.424 Résumé : Technology evaluation has played a crucial role in selecting and supporting companies with innovative technology. Previous studies have focused on developing technology evaluation methods such as scorecard. However, technology credit rating is rarely applied, despite its convenient usage for technology financing. In this paper, we propose a technology credit rating system, called cross matrix, based on empirical data obtained from the technology scoring model and examine their properties. The proposed rating system is expected to provide valuable information for effective management of the technology credit fund. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors201015a.html
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 616–626
Titre : An optimization-based decision support system for strategic planning in a process industry: the case of aluminium company in India Type de document : texte imprimé Auteurs : Dutta, G., Auteur ; Gupta, N., Auteur ; Fourer, R., Auteur Année de publication : 2011 Article en page(s) : pp. 616–626 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Practice of OR Decision support systems Optimization Production Index. décimale : 001.424 Résumé : We describe how a generic multi-period optimization-based decision support system (DSS) can be used for strategic planning in process industries. The DSS is built on five fundamental elements—materials, facilities, activities, storage areas, and time periods. It requires little direct knowledge of optimization techniques to be used effectively. Results based on real data from an aluminium company in India demonstrate significant potential for improvement in profits. We conclude with a comparison of similar studies in two other process industries. DEWEY : 004.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors20108a.html [article] An optimization-based decision support system for strategic planning in a process industry: the case of aluminium company in India [texte imprimé] / Dutta, G., Auteur ; Gupta, N., Auteur ; Fourer, R., Auteur . - 2011 . - pp. 616–626.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 616–626
Mots-clés : Practice of OR Decision support systems Optimization Production Index. décimale : 001.424 Résumé : We describe how a generic multi-period optimization-based decision support system (DSS) can be used for strategic planning in process industries. The DSS is built on five fundamental elements—materials, facilities, activities, storage areas, and time periods. It requires little direct knowledge of optimization techniques to be used effectively. Results based on real data from an aluminium company in India demonstrate significant potential for improvement in profits. We conclude with a comparison of similar studies in two other process industries. DEWEY : 004.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors20108a.html
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 627–637
Titre : A multi-period double coverage approach for locating the emergency medical service stations in Istanbul Type de document : texte imprimé Auteurs : Basar, A., Auteur ; Çatay, B., Auteur ; Ünlüyurt, T., Auteur Année de publication : 2011 Article en page(s) : pp. 627–637 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Maximal covering Multi-period backup double covering Tabu search Index. décimale : 001.424 Résumé : We consider the multi-period location planning problem of emergency medical service (EMS) stations. Our objective is to maximize the total population serviced by two distinct stations within two different response time limits over a multi-period planning horizon. Our aim is to provide a backup station in case no ambulance is available in the closer station and to develop a strategic plan that spans multiple periods. In order to solve this problem, we propose a Tabu Search approach. We demonstrate the effectiveness of the proposed approach on randomly generated data. We also implement our approach to the case of Istanbul to determine the locations of EMS stations in the metropolitan area. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors20105a.html [article] A multi-period double coverage approach for locating the emergency medical service stations in Istanbul [texte imprimé] / Basar, A., Auteur ; Çatay, B., Auteur ; Ünlüyurt, T., Auteur . - 2011 . - pp. 627–637.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 627–637
Mots-clés : Maximal covering Multi-period backup double covering Tabu search Index. décimale : 001.424 Résumé : We consider the multi-period location planning problem of emergency medical service (EMS) stations. Our objective is to maximize the total population serviced by two distinct stations within two different response time limits over a multi-period planning horizon. Our aim is to provide a backup station in case no ambulance is available in the closer station and to develop a strategic plan that spans multiple periods. In order to solve this problem, we propose a Tabu Search approach. We demonstrate the effectiveness of the proposed approach on randomly generated data. We also implement our approach to the case of Istanbul to determine the locations of EMS stations in the metropolitan area. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors20105a.html
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 638–650
Titre : Canadian forces global reach support hubs: facility location and aircraft routing models Type de document : texte imprimé Auteurs : Ghanmi, A., Auteur Année de publication : 2011 Article en page(s) : pp. 638–650 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Military Logistics Location Linear programming Index. décimale : 001.424 Résumé : The Canadian Forces (CF) is seeking to establish permanent and temporary operational support hubs at strategic locations around the globe to improve its logistics support effectiveness and responsiveness for deployed operations. This paper addresses two logistics problems associated with the hub-based support concept, namely, hub location optimization and aircraft routing problems. A discrete facility location model was developed to analyse the hub-based support effectiveness and to determine the optimal hub locations. An aircraft routing model was also developed to determine optimal aircraft routes for the movement of cargo and supplies from various support hubs to a theatre of operation. Both models were formulated using mixed integer nonlinear programming. Historical CF deployment and sustainment data were used to conduct the analysis and to illustrate the methodology. The study indicates that the hub-based support approach would offer potential cost avoidance on sustainment lift and could be an effective strategy for improvement of the CF's support capability. It also indicates that potential lift costs could be avoided through optimal routing of sustainment flights. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors201022a.html [article] Canadian forces global reach support hubs: facility location and aircraft routing models [texte imprimé] / Ghanmi, A., Auteur . - 2011 . - pp. 638–650.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 638–650
Mots-clés : Military Logistics Location Linear programming Index. décimale : 001.424 Résumé : The Canadian Forces (CF) is seeking to establish permanent and temporary operational support hubs at strategic locations around the globe to improve its logistics support effectiveness and responsiveness for deployed operations. This paper addresses two logistics problems associated with the hub-based support concept, namely, hub location optimization and aircraft routing problems. A discrete facility location model was developed to analyse the hub-based support effectiveness and to determine the optimal hub locations. An aircraft routing model was also developed to determine optimal aircraft routes for the movement of cargo and supplies from various support hubs to a theatre of operation. Both models were formulated using mixed integer nonlinear programming. Historical CF deployment and sustainment data were used to conduct the analysis and to illustrate the methodology. The study indicates that the hub-based support approach would offer potential cost avoidance on sustainment lift and could be an effective strategy for improvement of the CF's support capability. It also indicates that potential lift costs could be avoided through optimal routing of sustainment flights. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors201022a.html
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 651–661
Titre : Reducing workforce turnover in Asian factories using a mixed-mode modelling approachstar Type de document : texte imprimé Auteurs : Eady, J. A., Auteur ; Nicholls, M. G., Auteur Année de publication : 2011 Article en page(s) : pp. 651–661 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Labour turnover Mixed-mode modelling Strategy Index. décimale : 001.424 Résumé : While many studies have been conducted into labour productivity in Western countries, similar analysis is just beginning in their Asian counterparts. In this paper, the problem of workforce turnover is examined in the context of three case study companies (two Chinese and one Singaporean), all being outsource suppliers of manufactured products with relatively similar cultural and environmental influences. The cost of turnover is examined through a simple costing model that includes the indirect effects of lower-output rate and increased scrap because of worker inexperience, as well as the well-recognised direct costs. In addition, the model used extends the costing analysis by recognising the multiplier impact on the value-added lost by this inexperience. Having established the significance of the cost of workforce turnover on the performance of the companies studied, company data were utilised to undertake an analysis of the causes of the turnover to be undertaken, bearing in mind the existing findings reported in Western case studies. While the core reasons for the workforce turnover in the factories studied are consistent with findings elsewhere in the world, the weightings of individual contributing factors vary. This understanding provides the foundations for the development of proactive programs to reduce the incidence of labour turnover in the Asian context, thereby leading to considerable cost savings and other competitive benefits. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors201017a.html [article] Reducing workforce turnover in Asian factories using a mixed-mode modelling approachstar [texte imprimé] / Eady, J. A., Auteur ; Nicholls, M. G., Auteur . - 2011 . - pp. 651–661.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 651–661
Mots-clés : Labour turnover Mixed-mode modelling Strategy Index. décimale : 001.424 Résumé : While many studies have been conducted into labour productivity in Western countries, similar analysis is just beginning in their Asian counterparts. In this paper, the problem of workforce turnover is examined in the context of three case study companies (two Chinese and one Singaporean), all being outsource suppliers of manufactured products with relatively similar cultural and environmental influences. The cost of turnover is examined through a simple costing model that includes the indirect effects of lower-output rate and increased scrap because of worker inexperience, as well as the well-recognised direct costs. In addition, the model used extends the costing analysis by recognising the multiplier impact on the value-added lost by this inexperience. Having established the significance of the cost of workforce turnover on the performance of the companies studied, company data were utilised to undertake an analysis of the causes of the turnover to be undertaken, bearing in mind the existing findings reported in Western case studies. While the core reasons for the workforce turnover in the factories studied are consistent with findings elsewhere in the world, the weightings of individual contributing factors vary. This understanding provides the foundations for the development of proactive programs to reduce the incidence of labour turnover in the Asian context, thereby leading to considerable cost savings and other competitive benefits. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors201017a.html
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 662–666
Titre : Estimating a retailer's base stock level: an optimal distribution center order forecast policy Type de document : texte imprimé Auteurs : Williams, B. D., Auteur ; Waller, M. A., Auteur Année de publication : 2011 Article en page(s) : pp. 662–666 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Forecasting Supply chain management Retailing Base stock policy Index. décimale : 001.424 Résumé : Errors in order forecasts are a salient source of inefficiencies in retail supply chains. Many operational decisions made by suppliers hinge on order forecasts, which typically are based solely on either order or point-of-sale (POS) history. Using a discrete-time formulation, this research demonstrates that if a supplier knows that a retailer is using a base stock policy, it should use that knowledge to forecast the retailer's orders, even if the supplier does not know the base stock level and/or have access to POS data. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors201055a.html [article] Estimating a retailer's base stock level: an optimal distribution center order forecast policy [texte imprimé] / Williams, B. D., Auteur ; Waller, M. A., Auteur . - 2011 . - pp. 662–666.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 662–666
Mots-clés : Forecasting Supply chain management Retailing Base stock policy Index. décimale : 001.424 Résumé : Errors in order forecasts are a salient source of inefficiencies in retail supply chains. Many operational decisions made by suppliers hinge on order forecasts, which typically are based solely on either order or point-of-sale (POS) history. Using a discrete-time formulation, this research demonstrates that if a supplier knows that a retailer is using a base stock policy, it should use that knowledge to forecast the retailer's orders, even if the supplier does not know the base stock level and/or have access to POS data. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors201055a.html
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 667–676
Titre : Mean-variance portfolio rebalancing with transaction costs and funding changes Type de document : texte imprimé Auteurs : Glen, J. J., Auteur Année de publication : 2011 Article en page(s) : pp. 667–676 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Finance Portfolio rebalancing Quadratic programming Index. décimale : 001.424 Résumé : Investment portfolios should be rebalanced to take account of changing market conditions and changes in funding. Standard mean-variance (MV) portfolio selection methods are not appropriate for portfolio rebalancing, as the initial portfolio, change in funding and transaction costs are not considered. A quadratic mixed integer programming portfolio rebalancing model, which takes account of these factors is developed in this paper. The transaction costs in this portfolio rebalancing model are composed of fixed charges and variable costs, including the market impact costs associated with large market trades of individual securities, where these variable transaction costs are assumed to be non-linear functions of traded value. The use of this model is demonstrated and it is shown that when initial portfolio, funding changes and transaction costs are taken into account in portfolio construction and rebalancing, MV efficient portfolios that include risk-free lending do not have the structure expected from portfolio theory. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors2009148a.html [article] Mean-variance portfolio rebalancing with transaction costs and funding changes [texte imprimé] / Glen, J. J., Auteur . - 2011 . - pp. 667–676.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 667–676
Mots-clés : Finance Portfolio rebalancing Quadratic programming Index. décimale : 001.424 Résumé : Investment portfolios should be rebalanced to take account of changing market conditions and changes in funding. Standard mean-variance (MV) portfolio selection methods are not appropriate for portfolio rebalancing, as the initial portfolio, change in funding and transaction costs are not considered. A quadratic mixed integer programming portfolio rebalancing model, which takes account of these factors is developed in this paper. The transaction costs in this portfolio rebalancing model are composed of fixed charges and variable costs, including the market impact costs associated with large market trades of individual securities, where these variable transaction costs are assumed to be non-linear functions of traded value. The use of this model is demonstrated and it is shown that when initial portfolio, funding changes and transaction costs are taken into account in portfolio construction and rebalancing, MV efficient portfolios that include risk-free lending do not have the structure expected from portfolio theory. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors2009148a.html
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 677–689
Titre : Goal programming using multiple objective hybrid metaheuristic algorithm Type de document : texte imprimé Auteurs : Dhouib, S., Auteur ; Kharrat, A., Auteur ; Chabchoub, H., Auteur Année de publication : 2011 Article en page(s) : pp. 677–689 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Goal programming Multi-objective optimization Record-to-record travel algorithm Adaptive memory Variable neighbourhood search Index. décimale : 001.424 Résumé : In this paper, a Goal Programming (GP) model is converted into a multi-objective optimization problem (MOO) of minimizing deviations from fixed goals. To solve the resulting MOO problem, a hybrid metaheuristic with two steps is proposed to find the Pareto set's solutions. First, a Record-to-Record Travel with an adaptive memory is used to find first non-dominated Pareto frontier solutions preemptively. Second, a Variable Neighbour Search technique with three transformation types is used to intensify every non dominated solution found in the first Pareto frontier to produce the final Pareto frontier solutions. The efficiency of the proposed approach is demonstrated by solving two nonlinear GP test problems and three engineering design problems. In all problems, multiple solutions to the GP problem are found in one single simulation run. The results prove that the proposed algorithm is robust, fast and simply structured, and manages to find high-quality solutions in short computational times by efficiently alternating search diversification and intensification using very few user-defined parameters. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors2009181a.html [article] Goal programming using multiple objective hybrid metaheuristic algorithm [texte imprimé] / Dhouib, S., Auteur ; Kharrat, A., Auteur ; Chabchoub, H., Auteur . - 2011 . - pp. 677–689.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 677–689
Mots-clés : Goal programming Multi-objective optimization Record-to-record travel algorithm Adaptive memory Variable neighbourhood search Index. décimale : 001.424 Résumé : In this paper, a Goal Programming (GP) model is converted into a multi-objective optimization problem (MOO) of minimizing deviations from fixed goals. To solve the resulting MOO problem, a hybrid metaheuristic with two steps is proposed to find the Pareto set's solutions. First, a Record-to-Record Travel with an adaptive memory is used to find first non-dominated Pareto frontier solutions preemptively. Second, a Variable Neighbour Search technique with three transformation types is used to intensify every non dominated solution found in the first Pareto frontier to produce the final Pareto frontier solutions. The efficiency of the proposed approach is demonstrated by solving two nonlinear GP test problems and three engineering design problems. In all problems, multiple solutions to the GP problem are found in one single simulation run. The results prove that the proposed algorithm is robust, fast and simply structured, and manages to find high-quality solutions in short computational times by efficiently alternating search diversification and intensification using very few user-defined parameters. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors2009181a.html
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 690–699
Titre : Optimal supplier choice with discounting Type de document : texte imprimé Auteurs : Goldengorin, B., Auteur ; Keane, J., Auteur ; Kuzmenko, V., Auteur Année de publication : 2011 Article en page(s) : pp. 690–699 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Allocation Decision support systems Integer programming Location Index. décimale : 001.424 Résumé : This paper investigates a model for pricing the demand for a set of goods when suppliers operate discount schedules based on total business value. We formulate the buyers's decision problem as a mixed binary integer program, which is a generalization of the capacitated facility location problem (CFLP). A branch and bound (BnB) procedure using Lagrangean relaxation and subgradient optimization is developed for solving large-scale problems that can arise when suppliers’ discount schedules contain multiple price breaks. Results of computer trials on specially adapted large benchmark instances of the CFLP confirm that a sub-gradient optimization procedure based on Shor and Zhurbenko's r-algorithm, which employs a space dilation in the direction of the difference between two successive subgradients, can be used efficiently for solving the dual problem at any node of the BnB tree. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors2009164a.html [article] Optimal supplier choice with discounting [texte imprimé] / Goldengorin, B., Auteur ; Keane, J., Auteur ; Kuzmenko, V., Auteur . - 2011 . - pp. 690–699.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 690–699
Mots-clés : Allocation Decision support systems Integer programming Location Index. décimale : 001.424 Résumé : This paper investigates a model for pricing the demand for a set of goods when suppliers operate discount schedules based on total business value. We formulate the buyers's decision problem as a mixed binary integer program, which is a generalization of the capacitated facility location problem (CFLP). A branch and bound (BnB) procedure using Lagrangean relaxation and subgradient optimization is developed for solving large-scale problems that can arise when suppliers’ discount schedules contain multiple price breaks. Results of computer trials on specially adapted large benchmark instances of the CFLP confirm that a sub-gradient optimization procedure based on Shor and Zhurbenko's r-algorithm, which employs a space dilation in the direction of the difference between two successive subgradients, can be used efficiently for solving the dual problem at any node of the BnB tree. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors2009164a.html
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 700–710
Titre : Influence of aggregation and measurement scale on ranking a compromise alternative in AHP Type de document : texte imprimé Auteurs : Ishizaka, A., Auteur ; Balkenborg, D., Auteur ; Kaplan, T., Auteur Année de publication : 2011 Article en page(s) : pp. 700–710 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Decision analysis Multiple criteria analysis Utility theory Additive AHP Multiplicative AHP Logarithmic scale Index. décimale : 001.424 Résumé : Analytic Hierarchy Process (AHP) is one of the most popular multi-attribute decision aid methods. However, within AHP, there are several competing preference measurement scales and aggregation techniques. In this paper, we compare these possibilities using a decision problem with an inherent trade-off between two criteria. A decision-maker has to choose among three alternatives: two extremes and one compromise. Six different measurement scales described previously in the literature and the new proposed logarithmic scale are considered for applying the additive and the multiplicative aggregation techniques. The results are compared with the standard consumer choice theory. We find that with the geometric and power scales a compromise is never selected when aggregation is additive and rarely when aggregation is multiplicative, while the logarithmic scale used with the multiplicative aggregation most often selects the compromise that is desirable by consumer choice theory. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors201023a.html [article] Influence of aggregation and measurement scale on ranking a compromise alternative in AHP [texte imprimé] / Ishizaka, A., Auteur ; Balkenborg, D., Auteur ; Kaplan, T., Auteur . - 2011 . - pp. 700–710.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 700–710
Mots-clés : Decision analysis Multiple criteria analysis Utility theory Additive AHP Multiplicative AHP Logarithmic scale Index. décimale : 001.424 Résumé : Analytic Hierarchy Process (AHP) is one of the most popular multi-attribute decision aid methods. However, within AHP, there are several competing preference measurement scales and aggregation techniques. In this paper, we compare these possibilities using a decision problem with an inherent trade-off between two criteria. A decision-maker has to choose among three alternatives: two extremes and one compromise. Six different measurement scales described previously in the literature and the new proposed logarithmic scale are considered for applying the additive and the multiplicative aggregation techniques. The results are compared with the standard consumer choice theory. We find that with the geometric and power scales a compromise is never selected when aggregation is additive and rarely when aggregation is multiplicative, while the logarithmic scale used with the multiplicative aggregation most often selects the compromise that is desirable by consumer choice theory. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors201023a.html
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 711–721
Titre : An integrated optimization model for managing the global value chain of a chemical commodities manufacturer Type de document : texte imprimé Auteurs : Kannegiesser, M., Auteur ; Günther, H-O., Auteur Année de publication : 2011 Article en page(s) : pp. 711–721 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Value chain management Commodity business Linear optimization model Chemical industry Index. décimale : 001.424 Résumé : The realization of supply chain management concepts goes along with the introduction of comprehensive software systems for supporting decisions at the strategic, tactical, and operational planning level. Moreover, in industry the focus has shifted from a pure logistics-oriented view towards the integration of pricing and revenue issues into cross-functional value chain planning models. This paper presents a practical decision support tool for global value chain planning in the production of chemical commodities. The proposed linear optimization model consists of various modules that reflect sales, distribution, production, and procurement activities within a company-internal value chain. The objective of the model is to maximize profit by coordinating all activities within the supply chain. The model formulation is related to a real industry case. It is shown how the model can be used to support decision making from sales to procurement by volume and value. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors201018a.html [article] An integrated optimization model for managing the global value chain of a chemical commodities manufacturer [texte imprimé] / Kannegiesser, M., Auteur ; Günther, H-O., Auteur . - 2011 . - pp. 711–721.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 711–721
Mots-clés : Value chain management Commodity business Linear optimization model Chemical industry Index. décimale : 001.424 Résumé : The realization of supply chain management concepts goes along with the introduction of comprehensive software systems for supporting decisions at the strategic, tactical, and operational planning level. Moreover, in industry the focus has shifted from a pure logistics-oriented view towards the integration of pricing and revenue issues into cross-functional value chain planning models. This paper presents a practical decision support tool for global value chain planning in the production of chemical commodities. The proposed linear optimization model consists of various modules that reflect sales, distribution, production, and procurement activities within a company-internal value chain. The objective of the model is to maximize profit by coordinating all activities within the supply chain. The model formulation is related to a real industry case. It is shown how the model can be used to support decision making from sales to procurement by volume and value. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors201018a.html
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 722–728
Titre : On the usage of Lagrangean relaxation for the convoy movement problem Type de document : texte imprimé Auteurs : Ram Kumar, P. N., Auteur ; Narendran, T. T., Auteur Année de publication : 2011 Article en page(s) : pp. 722–728 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Military convoys Conflicts Scheduling Lagrangean relaxation Heuristics Index. décimale : 001.424 Résumé : The problem of routing military convoys between specific origin and destination pairs is known as convoy movement problem (CMP). In this study, we consider an existing mathematical model of CMP and propose a lower bounding procedure based on Lagrangean Relaxation. The robustness of the proposed procedure is evaluated on a variety of test problem instances. Encouraging results are obtained. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors20104a.html [article] On the usage of Lagrangean relaxation for the convoy movement problem [texte imprimé] / Ram Kumar, P. N., Auteur ; Narendran, T. T., Auteur . - 2011 . - pp. 722–728.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 722–728
Mots-clés : Military convoys Conflicts Scheduling Lagrangean relaxation Heuristics Index. décimale : 001.424 Résumé : The problem of routing military convoys between specific origin and destination pairs is known as convoy movement problem (CMP). In this study, we consider an existing mathematical model of CMP and propose a lower bounding procedure based on Lagrangean Relaxation. The robustness of the proposed procedure is evaluated on a variety of test problem instances. Encouraging results are obtained. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors20104a.html
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 729–741
Titre : Finding location equilibria for competing firms under delivered pricing Type de document : texte imprimé Auteurs : Pelegrín-Pelegrín, B., Auteur ; Dorta-González, P., Auteur ; Fernández-Hernández, P., Auteur Année de publication : 2011 Article en page(s) : pp. 729–741 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Location Game theory Integer programming Delivered pricing Index. décimale : 001.424 Résumé : We address the problem of finding location equilibria of a location-price game where firms first select their locations and then set delivered prices in order to maximize their profits. Assuming that firms set the equilibrium prices in the second stage, the game is reduced to a location game for which a global minimizer of the social cost is a location equilibrium if demand is completely inelastic and marginal production cost is constant. The problem of social cost minimization is studied for both a network and a discrete location space. A node optimality property when the location space is a network is shown and an Integer Linear Programming (ILP) formulation is obtained to minimize the social cost. It is also shown that multiple location equilibria can be found if marginal delivered costs are equal for all competitors. Two ILP formulations are given to select one of such equilibria that take into account the aggregated profit and an equity criterion, respectively. An illustrative example with real data is solved and some conclusions are presented. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors20102a.html [article] Finding location equilibria for competing firms under delivered pricing [texte imprimé] / Pelegrín-Pelegrín, B., Auteur ; Dorta-González, P., Auteur ; Fernández-Hernández, P., Auteur . - 2011 . - pp. 729–741.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 729–741
Mots-clés : Location Game theory Integer programming Delivered pricing Index. décimale : 001.424 Résumé : We address the problem of finding location equilibria of a location-price game where firms first select their locations and then set delivered prices in order to maximize their profits. Assuming that firms set the equilibrium prices in the second stage, the game is reduced to a location game for which a global minimizer of the social cost is a location equilibrium if demand is completely inelastic and marginal production cost is constant. The problem of social cost minimization is studied for both a network and a discrete location space. A node optimality property when the location space is a network is shown and an Integer Linear Programming (ILP) formulation is obtained to minimize the social cost. It is also shown that multiple location equilibria can be found if marginal delivered costs are equal for all competitors. Two ILP formulations are given to select one of such equilibria that take into account the aggregated profit and an equity criterion, respectively. An illustrative example with real data is solved and some conclusions are presented. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors20102a.html
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 742–749
Titre : Disruption management of the vehicle routing problem with vehicle breakdown Type de document : texte imprimé Auteurs : Mu, Q., Auteur ; Fu, Z., Auteur ; Lysgaard, J., Auteur Année de publication : 2011 Article en page(s) : pp. 742–749 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Vehicle breakdown Vehicle routing Heuristics Index. décimale : 001.424 Résumé : This paper introduces a new class of problem, the disrupted vehicle routing problem (VRP), which deals with the disruptions that occur at the execution stage of a VRP plan. The paper then focuses on one type of such problem, in which a vehicle breaks down during the delivery and a new routing solution needs to be quickly generated to minimise the costs. Two Tabu Search algorithms are developed to solve the problem and are assessed in relation to an exact algorithm. A set of test problems has been generated and computational results from experiments using the heuristic algorithms are presented. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors201019a.html [article] Disruption management of the vehicle routing problem with vehicle breakdown [texte imprimé] / Mu, Q., Auteur ; Fu, Z., Auteur ; Lysgaard, J., Auteur . - 2011 . - pp. 742–749.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 742–749
Mots-clés : Vehicle breakdown Vehicle routing Heuristics Index. décimale : 001.424 Résumé : This paper introduces a new class of problem, the disrupted vehicle routing problem (VRP), which deals with the disruptions that occur at the execution stage of a VRP plan. The paper then focuses on one type of such problem, in which a vehicle breaks down during the delivery and a new routing solution needs to be quickly generated to minimise the costs. Two Tabu Search algorithms are developed to solve the problem and are assessed in relation to an exact algorithm. A set of test problems has been generated and computational results from experiments using the heuristic algorithms are presented. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors201019a.html
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 750–759
Titre : Economic statistical design for x-bar control charts under non-normal distributed data with Weibull in-control time Type de document : texte imprimé Auteurs : Chen, F. L., Auteur ; Yeh, C. H., Auteur Année de publication : 2011 Article en page(s) : pp. 750–759 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Control charts Variable sampling Non-normal distribution Economic design Burr distribution Index. décimale : 001.424 Résumé : This paper proposes an approach which simultaneously considers the properties of cost and quality based on the Burr distribution to determine three parameters (including sample size, sampling interval between successive samples, and the control limits) when an x-bar chart monitors a manufacturing process with Weibull failure characteristic and non-normal data. Also, the cost model of Banerjee and Rahim (1988) is used as the objective function, and the probability density function of the Burr distribution is applied to derive the statistical constraints of economic statistical design of the x-bar control charts for non-normal data. The example of Banerjee and Rahim (1988) is adopted to indicate the solution procedure and sensitivity analyses. Meanwhile, the design parameters of the x-bar control charts can be obtained through the grid search method. The results show that an increase of skewness coefficient (α3) results in a slight decrease for sample size (n), but is robust to the control limit width (L). Also, an increase of kurtosis coefficient (α4) leads to a wider control limit width. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors201036a.html [article] Economic statistical design for x-bar control charts under non-normal distributed data with Weibull in-control time [texte imprimé] / Chen, F. L., Auteur ; Yeh, C. H., Auteur . - 2011 . - pp. 750–759.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 750–759
Mots-clés : Control charts Variable sampling Non-normal distribution Economic design Burr distribution Index. décimale : 001.424 Résumé : This paper proposes an approach which simultaneously considers the properties of cost and quality based on the Burr distribution to determine three parameters (including sample size, sampling interval between successive samples, and the control limits) when an x-bar chart monitors a manufacturing process with Weibull failure characteristic and non-normal data. Also, the cost model of Banerjee and Rahim (1988) is used as the objective function, and the probability density function of the Burr distribution is applied to derive the statistical constraints of economic statistical design of the x-bar control charts for non-normal data. The example of Banerjee and Rahim (1988) is adopted to indicate the solution procedure and sensitivity analyses. Meanwhile, the design parameters of the x-bar control charts can be obtained through the grid search method. The results show that an increase of skewness coefficient (α3) results in a slight decrease for sample size (n), but is robust to the control limit width (L). Also, an increase of kurtosis coefficient (α4) leads to a wider control limit width. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors201036a.html
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 760–767
Titre : Classification analysis for simulation of the duration of machine breakdowns Type de document : texte imprimé Auteurs : Lu, L., Auteur ; Currie, C. S. M., Auteur ; Cheng, R. C. H., Auteur Année de publication : 2011 Article en page(s) : pp. 760–767 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Simulation Classification Manufacturing Bootstrapping Index. décimale : 001.424 Résumé : Machine failure can have a significant impact on the throughput of manufacturing systems, therefore accurate modelling of breakdowns in manufacturing simulation models is essential. Finite mixture distributions have been successfully used by Ford Motor Company to model machine breakdown durations in simulation models of engine assembly lines. These models can be very complex, with a large number of machines. To simplify the modelling we propose a method of grouping machines with similar distributions of breakdown durations, which we call the Arrows Classification Method, where the Two-Sample Cramér-von-Mises statistic is used to measure the similarity of two sets of the data. We evaluate the classification procedure by comparing the throughput of a simulation model when run with mixture models fitted to individual machine breakdown durations; mixture models fitted to group breakdown durations; and raw data. Details of the methods and results of the classification will be presented, and demonstrated using an example. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors201033a.html [article] Classification analysis for simulation of the duration of machine breakdowns [texte imprimé] / Lu, L., Auteur ; Currie, C. S. M., Auteur ; Cheng, R. C. H., Auteur . - 2011 . - pp. 760–767.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 760–767
Mots-clés : Simulation Classification Manufacturing Bootstrapping Index. décimale : 001.424 Résumé : Machine failure can have a significant impact on the throughput of manufacturing systems, therefore accurate modelling of breakdowns in manufacturing simulation models is essential. Finite mixture distributions have been successfully used by Ford Motor Company to model machine breakdown durations in simulation models of engine assembly lines. These models can be very complex, with a large number of machines. To simplify the modelling we propose a method of grouping machines with similar distributions of breakdown durations, which we call the Arrows Classification Method, where the Two-Sample Cramér-von-Mises statistic is used to measure the similarity of two sets of the data. We evaluate the classification procedure by comparing the throughput of a simulation model when run with mixture models fitted to individual machine breakdown durations; mixture models fitted to group breakdown durations; and raw data. Details of the methods and results of the classification will be presented, and demonstrated using an example. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors201033a.html
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 768–775
Titre : Single-machine scheduling to minimize total absolute differences in waiting times with deteriorating jobs Type de document : texte imprimé Auteurs : Sun, L.-H., Auteur ; Sun, L.-Y., Auteur ; Wang, J.-B., Auteur Année de publication : 2011 Article en page(s) : pp. 768–775 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Scheduling Single machine Deteriorating jobs Total absolute differences in waiting times Heuristic algorithm Index. décimale : 001.424 Résumé : In this paper we consider a single-machine scheduling problem with simple linear deterioration. By simple linear deterioration, we mean that the processing time of a job is a simple linear function of its execution starting time and its deterioration rate. The objective is to find a schedule that minimizes total absolute differences in waiting times. We show that the optimal schedule is V-shaped: jobs are arranged in descending order of their deterioration rates if they are placed before the job with the smallest deterioration rate, but in ascending order of their deterioration rates if placed after it. We prove other several properties of an optimal schedule, and introduce two efficient heuristic algorithms that are tested against a lower bound. We also provide computational results to evaluate the performance of the heuristic algorithms. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors201026a.html [article] Single-machine scheduling to minimize total absolute differences in waiting times with deteriorating jobs [texte imprimé] / Sun, L.-H., Auteur ; Sun, L.-Y., Auteur ; Wang, J.-B., Auteur . - 2011 . - pp. 768–775.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 768–775
Mots-clés : Scheduling Single machine Deteriorating jobs Total absolute differences in waiting times Heuristic algorithm Index. décimale : 001.424 Résumé : In this paper we consider a single-machine scheduling problem with simple linear deterioration. By simple linear deterioration, we mean that the processing time of a job is a simple linear function of its execution starting time and its deterioration rate. The objective is to find a schedule that minimizes total absolute differences in waiting times. We show that the optimal schedule is V-shaped: jobs are arranged in descending order of their deterioration rates if they are placed before the job with the smallest deterioration rate, but in ascending order of their deterioration rates if placed after it. We prove other several properties of an optimal schedule, and introduce two efficient heuristic algorithms that are tested against a lower bound. We also provide computational results to evaluate the performance of the heuristic algorithms. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors201026a.html
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 776–783
Titre : Measuring dot com efficiency using a combined DEA and GRA approach Type de document : texte imprimé Auteurs : Bruce Ho, C.-T., Auteur Année de publication : 2011 Article en page(s) : pp. 776–783 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Dot com Internet Efficiency Grey relation analysis (GRA) Data envelopment analysis (DEA) Index. décimale : 001.424 Résumé : This paper adopts two mathematical approaches, data envelopment analysis (DEA) and grey relation analysis (GRA) to measure DEA efficiency using the sample of 69 listed US internet companies. A total of 40 indicators were initially selected for the efficiency evaluation, with 21 related to DEA-input indicators and 19 to DEA-output indicators. Eight representative indicators selected using GRA are subsequently used as the input and output indicators in the DEA analysis. The empirical result also shows that 10 out of 69 dot com firms are CCR-efficient in DEA Efficiency. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors20103a.html [article] Measuring dot com efficiency using a combined DEA and GRA approach [texte imprimé] / Bruce Ho, C.-T., Auteur . - 2011 . - pp. 776–783.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 776–783
Mots-clés : Dot com Internet Efficiency Grey relation analysis (GRA) Data envelopment analysis (DEA) Index. décimale : 001.424 Résumé : This paper adopts two mathematical approaches, data envelopment analysis (DEA) and grey relation analysis (GRA) to measure DEA efficiency using the sample of 69 listed US internet companies. A total of 40 indicators were initially selected for the efficiency evaluation, with 21 related to DEA-input indicators and 19 to DEA-output indicators. Eight representative indicators selected using GRA are subsequently used as the input and output indicators in the DEA analysis. The empirical result also shows that 10 out of 69 dot com firms are CCR-efficient in DEA Efficiency. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors20103a.html
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 784–798
Titre : After paradim: why mixing-methodology theorising fails and how to make it work again Type de document : texte imprimé Auteurs : Zhu, Z., Auteur Année de publication : 2011 Article en page(s) : pp. 784–798 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Methodology Paradigm Ontological flexibility Pragmatism Index. décimale : 001.424 Résumé : Combining multiple methodologies works in practice, but not yet in theory. One of the reasons is that current theorising is dominated by a paradigm mentality, preoccupied with wholesale philosophical legitimation. ‘Paradigm’ and the associated ‘incommensurability’ were once revolutionary heuristic tools; now they are mistaken for the basis of an essentialist foundation. The result is a stifling of intellectual innovation and a diminishing of practical relevance. For OR research to make a positive difference again, it is time to move beyond paradigm-based theorising. After paradigm, there are many opportunities. This paper explores a pragmatist alternative that is action-oriented, multiplicity-embracing, ethically concerned and politically sensitive. Incorporating ontological flexibility, it allows OR workers to enact multiple realities, craft ontology-in-use, weave available methods with situated particulars, justify methodologies based on practical consequences, so as to get jobs done and enhance competences. Promoting ontological flexibility and methodology-in-use is a useful starting point for after-paradigm theorising that supports innovative mixing-methodology practice. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors201031a.html [article] After paradim: why mixing-methodology theorising fails and how to make it work again [texte imprimé] / Zhu, Z., Auteur . - 2011 . - pp. 784–798.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 784–798
Mots-clés : Methodology Paradigm Ontological flexibility Pragmatism Index. décimale : 001.424 Résumé : Combining multiple methodologies works in practice, but not yet in theory. One of the reasons is that current theorising is dominated by a paradigm mentality, preoccupied with wholesale philosophical legitimation. ‘Paradigm’ and the associated ‘incommensurability’ were once revolutionary heuristic tools; now they are mistaken for the basis of an essentialist foundation. The result is a stifling of intellectual innovation and a diminishing of practical relevance. For OR research to make a positive difference again, it is time to move beyond paradigm-based theorising. After paradigm, there are many opportunities. This paper explores a pragmatist alternative that is action-oriented, multiplicity-embracing, ethically concerned and politically sensitive. Incorporating ontological flexibility, it allows OR workers to enact multiple realities, craft ontology-in-use, weave available methods with situated particulars, justify methodologies based on practical consequences, so as to get jobs done and enhance competences. Promoting ontological flexibility and methodology-in-use is a useful starting point for after-paradigm theorising that supports innovative mixing-methodology practice. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors201031a.html
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 799–805
Titre : An adaptive routing strategy for freight transportation networks Type de document : texte imprimé Auteurs : Shi, N., Auteur ; Cheung, R. K., Auteur ; Xu, H., Auteur Année de publication : 2011 Article en page(s) : pp. 799–805 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Dynamic routing Material handling system Stochastic approximation Index. décimale : 001.424 Résumé : We introduce an adaptive routing strategy (ARS) for transportation networks. In this strategy, the route choice is made adaptively based on the real-time information of the whole system. An efficient optimization-based heuristic is proposed to support such real-time decision-making process. Numerical results show that our ARS outperforms both the static routing method and the original dynamic routing method. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors20107a.html [article] An adaptive routing strategy for freight transportation networks [texte imprimé] / Shi, N., Auteur ; Cheung, R. K., Auteur ; Xu, H., Auteur . - 2011 . - pp. 799–805.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 4 (Avril 2011) . - pp. 799–805
Mots-clés : Dynamic routing Material handling system Stochastic approximation Index. décimale : 001.424 Résumé : We introduce an adaptive routing strategy (ARS) for transportation networks. In this strategy, the route choice is made adaptively based on the real-time information of the whole system. An efficient optimization-based heuristic is proposed to support such real-time decision-making process. Numerical results show that our ARS outperforms both the static routing method and the original dynamic routing method. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n4/abs/jors20107a.html
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