116 resultados para Intermodal


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Dissertação apresentada ao Instituto Politécnico do Porto para obtenção do Grau de Mestre em Logística Orientado pela professora Doutora Maria Teresa Ribeiro Pereira Esta dissertação não inclui as críticas e sugestões feitas pelo Júri.

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The major objective of this thesis is to describe and analyse how a railcarrier is engaged in an intermodal freight transportation network through its role and position. Because of the fact that the role as a conceptualisation has a lot of parallels with the position, both these phenomena are evaluated theoretically and empirically. VR Cargo (a strategical business unitof the Finnish railway company VR Ltd.) was chosen to be the focal firm surrounded by the actors of the focal net. Because of the fact that networks are sets of relationships rather than sets of actors, it is essential to describe the dimensions of the relationships created through the time thus having a past, presentand future. The roles are created during long common history shared by the actors especially when IM networks are considered. The presence of roles is embeddedin the tasks, and the future is anchored to the expectations. Furthermore, in this study role refers to network dynamics, and to incremental and radical changes in the network, in a similar way as position refers to stability and to the influences of bonded structures. The main purpose of the first part of the study was to examine how the two distinctive views that have a dominant position in modern logistics ¿ the network view (particularly IMP-based network approach) and the managerial view (represented by Supply Chain Management) differ, especially when intermodalism is under consideration. In this study intermodalism was defined as a form of interorganisational behaviour characterized by the physical movement of unitized goods with Intermodal Transport Units, using more than one mode as performed by the net of operators. In this particular stage the study relies mainly on theoretical evaluation broadened by some discussions with the practitioners. This is essential, because the continuous dialogue between theory and practice is highly emphasized. Some managerial implications are discussed on the basis of the theoretical examination. A tentative model for empirical analysis in subsequent research is suggested. The empirical investigation, which relies on the interviews among the members in the focal net, shows that the major role of the focal company in the network is the common carrier. This role has some behavioural and functional characteristics, such as an executive's disclosure expressing strategic will attached with stable and predictable managerial and organisational behaviour. Most important is the notion that the focal company is neutral for all the other operators, and willing to enhance and strengthen the collaboration with all the members in the IM network. This also means that all the accounts are aimed at being equal in terms of customer satisfaction. Besides, the adjustments intensify the adopted role. However, the focal company is also obliged tosustain its role as it still has a government-erected right to maintain solely the railway operations on domestic tracks. In addition, the roles of a dominator, principal, partner, subcontractor, and integrator were present appearing either in a dyadic relationship or in net(work) context. In order to reveal differentroles, a dualistic interpretation of the concept of role/position was employed.

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Transportation plays a major role in the gross domestic product of various nations. There are, however, many obstacles hindering the transportation sector. Cost-efficiency along with proper delivery times, high frequency and reliability are not a straightforward task. Furthermore, environmental friendliness has increased the importance of the whole transportation sector. This development will change roles inside the transportation sector. Even now, but especially in the future, decisions regarding the transportation sector will be partly based on emission levels and other externalities originating from transportation in addition to pure transportation costs. There are different factors, which could have an impact on the transportation sector. IMO’s sulphur regulation is estimated to increase the costs of short sea shipping in the Baltic Sea. Price development of energy could change the roles of different transport modes. Higher awareness of the environmental impacts originating from transportation could also have an impact on the price level of more polluting transport modes. According to earlier research, increased inland transportation, modal shift and slowsteaming can be possible results of these changes in the transportation sector. Possible changes in the transportation sector and ways to settle potential obstacles are studied in this dissertation. Furthermore, means to improve cost-efficiency and to decrease environmental impacts originating from transportation are researched. Hypothetical Finnish dry port network and Rail Baltica transport corridor are studied in this dissertation. Benefits and disadvantages are studied with different methodologies. These include gravitational models, which were optimized with linear integer programming, discrete-event and system dynamics simulation, an interview study and a case study. Geographical focus is on the Baltic Sea Region, but the results can be adapted to other geographical locations with discretion. Results indicate that the dry port concept has benefits, but optimization regarding the location and the amount of dry ports plays an important role. In addition, the utilization of dry ports for freight transportation should be carefully operated, since only a certain amount of total freight volume can be cost-efficiently transported through dry ports. If dry ports are created and located without proper planning, they could actually increase transportation costs and delivery times of the whole transportation system. With an optimized dry port network, transportation costs can be lowered in Finland with three to five dry ports. Environmental impacts can be lowered with up to nine dry ports. If more dry ports are added to the system, the benefits become very minor, i.e. payback time of investments becomes extremely long. Furthermore, dry port network could support major transport corridors such as Rail Baltica. Based on an analysis of statistics and interview study, there could be enough freight volume available for Rail Baltica, especially, if North-West Russia is part of the Northern end of the corridor. Transit traffic to and from Russia (especially through the Baltic States) plays a large role. It could be possible to increase transit traffic through Finland by connecting the potential Finnish dry port network and the studied transport corridor. Additionally, sulphur emission regulation is assumed to increase the attractiveness of Rail Baltica in the year 2015. Part of the transit traffic could be rerouted along Rail Baltica instead of the Baltic Sea, since the price level of sea transport could increase due to the sulphur regulation. Both, the hypothetical Finnish dry port network and Rail Baltica transport corridor could benefit each other. The dry port network could gain more market share from Russia, but also from Central Europe, which is the other end of Rail Baltica. In addition, further Eastern countries could also be connected to achieve higher potential freight volume by rail.

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La thèse propose d’introduire une perspective globale dans le traitement juridique du transport intermodal international qui prendrait racine dans la stratégie logistique des entreprises. La conception juridique se heurte, en effet, aux évolutions opérationnelles et organisationnelles des transports et aboutit à une incertitude juridique. Les transporteurs ont dû s’adapter aux exigences d’optimisation des flux des chargeurs dont les modes de production et de distribution reposent sur le supply chain management (SCM). Ce concept est le fruit de la mondialisation et des technologies de l’information. La concurrence induite par la mondialisation et le pilotage optimal des flux ont impulsé de nouvelles stratégies de la part des entreprises qui tentent d’avoir un avantage concurrentiel sur le marché. Ces stratégies reposent sur l’intégration interfonctionnelle et interoganisationnelle. Dans cette chaîne logistique globale (ou SCM) l’intermodal est crucial. Il lie et coordonne les réseaux de production et de distribution spatialement désagrégés des entreprises et, répond aux exigences de maîtrise de l’espace et du temps, à moindre coût. Ainsi, le transporteur doit d’une part, intégrer les opérations de transport en optimisant les déplacements et, d’autre part, s’intégrer à la chaîne logistique du client en proposant des services de valeur ajoutée pour renforcer la compétitivité de la chaîne de valeur. Il en découle une unité technique et économique de la chaîne intermodale qui est pourtant, juridiquement fragmentée. Les Conventions internationales en vigueur ont été élaborées pour chaque mode de transport en faisant fi de l’interaction entre les modes et entre les opérateurs. L’intermodal est considéré comme une juxtaposition des modes et des régimes juridiques. Ce dépeçage juridique contraste avec la gestion de la chaîne intermodale dont les composantes individuelles s’effacent au profit de l’objectif global à atteindre. L’on expose d’abord l’ampleur de l’incertitude juridique due aux difficultés de circonscrire le champ d’opérations couvert par les Conventions en vigueur. Une attention est portée aux divergences d’interprétations qui débouchent sur la « désunification » du droit du transport. On s’intéresse ensuite aux interactions entre le transport et la chaîne logistique des chargeurs. Pour cela, on retrace l’évolution des modes de production et de distribution de ces derniers. C’est effectivement de la stratégie logistique que découle la conception de la chaîne intermodale. Partant de ce système, on identifie les caractéristiques fondamentales de l’intermodal. La thèse aboutit à dissiper les confusions liées à la qualification de l’intermodal et qui sont à la base des divergences d’interprétations et de l’incertitude juridique. De plus, elle met en exergue l’unité économique du contrat de transport intermodal qui devrait guider la fixation d’un régime de responsabilité dédié à ce système intégré de transport. Enfin, elle initie une approche ignorée des débats juridiques.

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Los resultados de esta investigación tienen como finalidad abrir los horizontes analíticos en el área del estudio de desarrollo regional, que frecuentemente no contempla la dimensión política, y la estructura conceptual y teórica del desarrollo sostenible además de ilustrar a organismos de carácter público o privado interesados en la materia que posean la capacidad de transformar este acercamiento académico y práctico a una realidad correcta. Para tal efecto en el primer capitulo se ubica y describe la zona geográfica de estudio, se realiza la justificación de los esfuerzos por adecuar esta vía de 8 comunicación en un corredor intermodal boiceánico, junto con una reseña de los hechos que dieron lugar al impulso político, social y económico de este proyecto. En el segundo capitulo se describe el marco político e institucional que da sustento político y económico al proyecto; el Server capítulo observa la dinámica y comportamiento de las actividades y circuitos productivos de la región. El cuarto capitulo valora el potencial de explotación y las posibles áreas en las cuales se desarrollarían proyectos de desarrollo sostenible. El quinto capitulo evaluará por medio del modelo de desarrollo sostenible los posibles impactos positivos de la adecuación de corredor intermodal Tumaco – Puerto Asís – Belém del Pará para el desarrollo sostenible de la región amazónica colombo brasileña.

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O objetivo do trabalho é analisar o transporte intermodal de cargas agrícolas e suas interfaces no Brasil. Devido ao grande numero de combinações possíveis, decidiu-se concentrar os estudos na movimentação de grãos, e dentro desta alternativa escolheu-se a soja que é o principal item da pauta de exportações agrícolas brasileira, superando o tradicional café (MRE (I) - Cacex), e o arroz que é o principal item de consumo alimentar no Brasil (MAA(2) - Ministério da Agricultura e do Abastecimento). Esta análise envolverá a movimentação dos produtos escolhidos para estudo, desde a fonte produtora, passando pela unidade de beneficiamento ou industrialização, até chegar ao seu ponto de entrega, incluindo: embalagem (quando o transporte não é for granel), modal de transporte utilizado, interfaces de transferência e armazenagem, quantidades movimentadas de cada produto típico e a pesquisa de custo porta-a-porta. Como conclusão será feita uma avaliação critica dos procedimentos logísticos encontrados e feitas sugestões para melhorar a qualidade e reduzir os custos totais nas movimentaçõesdas cargas estudadas

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Includes bibliography

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Includes bibliography