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    Wyświetlanie 1-3 z 3
    Tytuł:
    Optimal vehicle route schedules in picking up and delivering cargo containers considering time windows in logistics distribution networks: A case study
    Autorzy:
    Le, Thi Diem Chau
    Nguyen, Duy Duc
    Oláh, Judit
    Pakurár, Miklós
    Powiązania:
    https://bibliotekanauki.pl/articles/1839502.pdf
    Data publikacji:
    2020
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    vehicle routing problem
    logistics distribution network
    time window
    guided local search
    tabu search
    simulated annealing
    problem trasowania pojazdów
    sieć dystrybucji
    okno czasowe
    wyszukiwanie lokalne
    symulowane wyżarzanie
    Opis:
    This study describes a pickup and delivery vehicle routing problem, considering time windows in reality. The problem of tractor truck routes is formulated by a mixed integer programming model. Besides this, three algorithms - a guided local search, a tabu search, and simulated annealing - are proposed as solutions. The aims of our study are to optimize the number of internal tractor trucks used, and create optimal routes in order to minimize total logistics costs, including the fixed and variable costs of an internal vehicle group and the renting cost of external vehicles. Besides, our study also evaluates both the quality of solutions and the time to find optimal solutions to select the best suitable algorithm for the real problem mentioned above. A novel mathematical model is formulated by OR tools for Python. Compared to the current solution, our results reduced total costs by 18%, increased the proportion of orders completed by internal vehicles (84%), and the proportion of orders delivered on time (100%). Our study provides a mathematical model with time constraints and large job volumes for a complex distribution network in reality. The proposed mathematical model provides effective solutions for making decisions at logistics companies. Furthermore, our study emphasizes that simulated annealing is a more suitable algorithm than the two others for this vehicle routing problem.
    Źródło:
    Production Engineering Archives; 2020, 26, 4; 174-184
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Supporting of manufacturer’s demand plans as an element of logistics coordination in the distribution network
    Autorzy:
    Kmiecik, Mariusz
    Powiązania:
    https://bibliotekanauki.pl/articles/23966908.pdf
    Data publikacji:
    2023
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    dostawca usług logistycznych
    3pl - logistyka strony trzeciej
    koordynacja logistyki
    sieć dystrybucyjna
    prognozowanie popytu
    logistics service provider
    3pl–third party logistics
    logistics coordination
    distribution network
    demand forecasting
    Opis:
    The paper deals with the concept of centralized demand forecasting and logistical coordination in distribution networks. The aim of the paper is to relate the results provided by the forecasting tools to the basic aspects of logistical coordination. The case of 29 distribution networks in which a logistics operator (3PL) operates and provides contract logistics services to a manufacturing company is analysed. The paper partially confirms the hypothesis of better testability of forecasts based on machine learning algorithms and artificial neural networks for demand planning by the logistics operator to the manufacturer in the framework of logistics coordination in the distribution network. These algorithms perform better for networks with high specificity of flows and food networks. Traditional algorithms, on the other hand, have their better share in creating forecasts for more standard distribution networks. Addi tionally, the second hypothesis regarding the positive influence of modern technological solutions (such as the use of cloud technologies, EDI and flow tracking standards) was confirmed. Additionally, a number of factors that did not have a direct impact on forecasting errors were detailed.
    Źródło:
    Production Engineering Archives; 2023, 29, 1; 69--82
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Changes in Cargo Movement due to the Effects of COVID-19
    Autorzy:
    Suzuki, Kuninori
    Ikushima, Yoshihide
    Murayama, Yoji
    Powiązania:
    https://bibliotekanauki.pl/articles/23966930.pdf
    Data publikacji:
    2023
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    logistyka
    dostawa żywności
    wspólne centrum dystrybucyjne
    zapasy zarządzane przez dostawcę
    mały ładunek
    logistics
    food delivery
    joint distribution centre
    vendor managed inventory
    small cargo
    Opis:
    This study analyses and discusses how the unique cargo movements in Japan and changes in the social environment during the COVID-19 pandemic have affected social life. Since the outbreak of COVID-19, cargo movements in Japan have undergone significant changes. This study analyses cargo movements in Japan by showing correlation coefficients to indicate the extent to which each industry was affected by the spread of the new coronavirus to infected persons. The heightened awareness of the pandemic caused by the state of emergency led to the closure of many stores and a decline in outbound shipments. Although the volume of incoming shipments increased, the volume of outgoing shipments did not. As a result, warehouse vacancy rates declined. Therefore, the study revealed that distribution centers in Japan are becoming more self-sufficient, and cloud-based logistics information systems are becoming more widely used.
    Źródło:
    Production Engineering Archives; 2023, 29, 2; 147--154
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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