• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1
  • Tagged with
  • 2
  • 2
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Analys och optimering av godsflöden i Linköpings city / Analysis and optimization of city center goods distribution in Linköping

Engberg, Lovisa January 2012 (has links)
Expanderande städer resulterar i ökande behov av godstransporter och för att behålla en fungerande godsdistribution kan åtgärder behöva vidtas. Trafikstockning och försämrad stadsmiljö är negativa effekter som kan förknippas med en dåligt fungerande godsdistribution. Citylogistik handlar om att kontrollera och optimera godstransporter i urbana områden (city) så att negativa effekter minimeras. Olika typer av citylogistiska åtgärder och koncept har identifierats. Till dem hör till exempel samdistribution, reglering av godstransporter och avancerade IT-system. Inom ramen för projektet SAMLIC, som startades i Linköping 2004, genomfördes pilotförsöket PILOT med det övergripande syftet att utvärdera ekonomisk potential med samdistribution i Linköpings city. Under PILOT omsattes ett samdistributionskoncept i praktiken. En databas med information om godsdistributionen under försöket upprättades för senare analys. Syftet med detta examensarbete har varit att formulera matematiska modeller över godsdistributionen i ett medelstort city, som kan ge underlag för utvärdering av citylogistiska koncept och i synnerhet samdistributionskoncept. De matematiska modeller som tagits fram är optimeringsmodeller för ruttplanering och metoder för att lösa optimeringsmodellerna har implementerats. För att utvärdera modellerna och metoderna har en fallstudie av Linköpings city gjorts, med datamaterial från PILOT. Modellerna ger möjlighet till effektiva analyser och jämförelser av citylogistiska koncept. Fallstudien visar dessutom att optimering av godsdistributionen i city innebär god förbättringspotential vilket ger ytterligare motiv till att använda modeller som verktyg. / Urbanization and city expansion result in an increasing need of transportation of goods, and in order to maintain efficiency, measures are needed. The aim of city logistics is to minimize negative impacts associated with city center goods distribution, such as traffic congestion and negative impacts on the living environment. Several city logistic measures have previously been suggested, such as freight consolidation, governance and advanced IT systems. Within the SAMLIC project started in 2004, a demonstration project known as PILOT was carried out in central Linköping, wherein the concept of freight consolidation was applied in reality. The objective was to evaluate the economic potential of freight consolidation. The aim of this thesis was to formulate mathematical models of the distribution of goods in a medium sized Swedish city. The models are to be used in the evaluation of city logistic measures, focusing on freight consolidation. The distribution problem is modelled as a vehicle routing problem, and methods for solving the resulting optimization problems have been implemented. Using data from PILOT, the models have been applied on Linköping with the purpose of evaluating the methods, as well as investigating the potential of using models for planning the distribution of goods. Conclusions involve that analyses of, and comparisons between, city lo-gistic measures can be efficiently made using mathematical models. The case study also indicates that goods distribution can be improved through the use of optimization methods, which further motivates mathematical modelling.
2

Propuesta de mejora para disminuir el número de pedidos reingresados en una empresa distribuidora de embutidos

Vizarreta Huertas, Juan Christian, Flores Berrios, Elsa Gabriela 24 July 2020 (has links)
La siguiente investigación tiene como objetivo desarrollar propuestas de mejora para la empresa SUPEMSA, con el fin de poder reducir en gran proporción la cantidad de productos reingresados y mejorar la productividad económica. Por ende, se desarrolló un análisis exhaustivo de la empresa tanto interno como externo para determinar sus principales causas y problemas. Como parte del diagnóstico, se conoció el funcionamiento interno de la empresa, y se identificaron y analizaron los diversos problemas que tenía; posterior a ello, se plantearon alternativas de solución sostenibles, las cuales están alineadas a las principales herramientas de ingeniería descritas y utilizadas en el proyecto. Finalmente se plantearon algunas conclusiones y recomendaciones de la investigación, las cuales dan una visión final de todo lo investigado en este proyecto y de lo que debería realizar la empresa para remediar el problema principal. / The following investigation aims to develop improvement proposals for SUPEMSA, in order to be able to reduce the number of re-entered products and improve their productivity. Therefore, an exhaustive analysis internal and external of the company has been developed to determine its main causes and problems. As part of the diagnosis, it was requested to know the internal process of the company and how they operate, many problems were identified and analyzed; after that, sustainable solution alternatives were proposed which are aligned with the main engineering tools described and used in the project. Finally, some conclusions and recommendations of the research has been proposed which provides a final vision of the investigation in this project and what the company should do to solve the main problem. / Trabajo de Suficiencia Profesional

Page generated in 0.1213 seconds