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Wyświetlanie 1-2 z 2
Tytuł:
Decision support system in freight transport based on vehicle routing problem with quality criterion
Autorzy:
Szczepański, E.
Jachimowski, R.
Żak, J.
Powiązania:
https://bibliotekanauki.pl/articles/393872.pdf
Data publikacji:
2018
Wydawca:
Polskie Stowarzyszenie Telematyki Transportu
Tematy:
decision support systems
vehicle routing problem
VRP
optimization
system wspomagania decyzji
problem trasowania pojazdów
optymalizacja
Opis:
Deliveries planning in transport systems is a complicated task and require taking into account a wide range of factors. Enterprises wanting to propose solutions that meet the clients’ needs and be competitive on the market must prepare their offer based on decision support systems including factors characteristic for the real process. The aim of the article is to present a concept of a decision support system based on a multi-criteria vehicle routing problem in real conditions (Real-World VRP). Taking into account the latest trends in the optimization of the delivery plan, the model includes three criteria - the cost, time and success rate of the delivery plan as a criterion relating to the quality of the delivery plan. Among other assumptions, it should be pointed out that the heterogeneous structure of the rolling stock has been taken into account, the number of which is not limited, the vehicles return to the place of origin. The travel time of the connection and the time of loading operations are random variables. The limited driver’s work time and driving time were also applied. The effect of the work presented in the article is the concept of the decision support system in the freight transport, taking into account the quality criterion of the delivery plan.
Źródło:
Archives of Transport System Telematics; 2018, 11, 3; 49-56
1899-8208
Pojawia się w:
Archives of Transport System Telematics
Dostawca treści:
Biblioteka Nauki
Artykuł
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
    Wyświetlanie 1-2 z 2

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