Design of distribution network using hub location model with regard to capacity constraint and service level

With the gradual implementation of the Belt & Road Initiative, China Railway Express (CRExpress) has gradually gained support as an important transportation mode between China and Europe. However, the high cost of operation, caused by the unscientific organization mode and the small quantity of returning cargo, hinders the further development of CRExpress. Prior studies have shown that applying the hub-and-spoke transportation organization mode to the CRExpress system could decrease operational cost effectively. To carry out network planning for CRExpress, based on its present situation and properties, a conventional hub location model is adjusted. The network planning location model for CRExpress which minimizes total operation cost and allows direct transportation mode is proposed as well as an algorithm based on the genetic algorithm (GA) approach. The reasonableness and feasibility of the model and algorithm are investigated and verified through a case study based on the CRExpress system. The result indicates that Chengdu, Yingkow, and Zhengzhou are selected as consolidation centers whereas Urumqi and Xining adopt direct transportation mode.

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Location Model for Double-Hierarchy Distribution Network

International Conference on Transportation Engineering 2007 ◽

10.1061/40932(246)603 ◽

2007 ◽

Author(s):

Shuqin Wang ◽

Mei Sha

Keyword(s):

Distribution Network ◽

Location Model

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PENGEMBANGAN PELAYANAN SISTEM DISTRIBUSI AIR MINUM KOTA TEGAL

Jurnal Purifikasi ◽

10.12962/j25983806.v14.i1.7 ◽

2014 ◽

Vol 14 (1) ◽

pp. 28-39

Author(s):

Yustika Kusumawardani ◽

Wiharyanti Oktiawan ◽

Ganjar Samudro

Keyword(s):

Distribution System ◽

Water Pressure ◽

Distribution Network ◽

Water Source ◽

Distribution Networks ◽

Service Level ◽

Water Supply Systems ◽

Raw Water ◽

Head Of Household ◽

Central Java

Kota Tegal merupakan salah satu daerah otonom di Provinsi Jawa Tengah yang memiliki jumlah penduduk 248.722 jiwa dengan jumlah kepala keluarga sebesar 61.513. Namun dari keseluruhan jumlah penduduk tersebut tercatat hanya 11.882 pelanggan atau sekitar 19,32% penduduk yang terlayani oleh PDAM Kota Tegal dan tingkat kebocoran air sebesar 44,21%. Tekanan air pada sistem distribusi eksisting sangat rendah karena menara air yang tersedia tidak dapat difungsikan. Kapasitas sumber air baku yang saat ini dimiliki PDAM Kota Tegal adalah 190 lt/dtk. Pengembangan jaringan distribusi sistem penyediaan air minum untuk wilayah Kota Tegal direncanakan hingga tahun 2021 dengan menggunakan sumber air baku baru yang berasal dari PDAB Jawa Tengah yaitu penambahan sebesar 200 liter/detik. Kapasitas air tersebut digunakan untuk menambah wilayah pelayanan di kecamatan Tegal Selatan, Tegal Barat, Tegal Timur dan Margadana. Pengembangan jaringan distribusi baru dapat melayani pelanggan sambungan rumah baru sebesar 16.071 SR dengan presentase rencana pengembangan hingga 79,80 % untuk seluruh wilayah Kota Tegal. Tingkat pelayanan pada Kecamatan Tegal Selatan, Tegal Timur, Tegal Barat dan untuk Kecamatan Margadana adalah 20,96% 16,92%, 19,19% dan 22,72% secara berturut-turut. Perencanaan jaringan distribusi baru tersebut menggunakan pola jaringan distribusi bercabang dan tidak terkoneksi dengan sistem jaringan distribusi lama dengan total anggaran biaya sebesar Rp 17.363.693.000,00. Tegal Region determined as one of the otonomical regions located in Central Java which has 248,722 populations with the number of head of household 61,513. From that total population was recorded only 11,882 custumers, or approximately 19.32% of the population served by PDAM Tegal with a leak rate it’s about 44.21%. Moreover the water pressure on the existing distribution system is very low because the water tower can not used. Capacity of raw water source that is currently owned by PDAM Tegal is 190 l/sec. Development of distribution networks for drinking water supply systems in Tegal region is planned until the year 2021 using the new raw water sources originating from PDAB in Central Java that is equal to 200 l/sec. Water capacity is used to increase the service area in the district of Tegal Selatan, Tegal Barat, Tegal Timur and Margadana. From that new development distribution network can fullfil customer connections for 16,071 household connections by the percentage of SR development plan up to 79.80% for the entire region Tegal. Which is the service level of each district are 20.96% for Tegal Selatan subdistrict, 16.92%, Tegal Timur subdistrict, 19.19% Tegal Barat subdistrict and 22.72% for Margadana subistrict. The new distribution network planning is designed using branch pattern of the distribution network and unconnected to the old system of distribution network results the total budget about Rp 17,363,693,000.00.

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Optimization of the Collaborative Hub Location Problem with Metaheuristics

Mathematics ◽

10.3390/math9212759 ◽

2021 ◽

Vol 9 (21) ◽

pp. 2759

Author(s):

Gargouri Mohamed Amine ◽

Hamani Nadia ◽

Mrabti Nassim ◽

Kermad Lyes

Keyword(s):

Distribution Network ◽

Ghg Emissions ◽

Three Dimensions ◽

Mixed Integer ◽

Particle Swarm Algorithm ◽

Hub Location ◽

Hub Location Problem ◽

Health Crisis ◽

Job Opportunities ◽

The Social

By creating new job opportunities and developing the regional economy, the transport of goods generates significant costs, environmental and sanitary nuisances, and high greenhouse gas (GHG) emissions. In this context, collaboration is an interesting solution that can be used to enable companies to overcome some problems such as globalization, economic crisis, health crisis, issues related to sustainability, etc. This study deals with the design of a multiperiod multiproduct three-echelon collaborative distribution network with a heterogeneous fleet. By applying the mixed integer linear problem (MILP) formulations, it was possible to study the three dimensions of sustainability (economic, environmental, and social/societal). Since the examined problem was NP-hard, it was solved using four metaheuristic approaches to minimize the different logistics costs or CO2 emissions. The social/societal aspect evaluated the accident rate and the noise level generated by the freight transport. Four algorithms were developed to achieve our objectives: a genetic algorithm, a simulated annealing, a particle swarm algorithm, and a vibration damping optimization algorithm. Considering a French distribution network, these algorithms overcame the limits of the exact solution method by obtaining optimal solutions with reasonable execution time.

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The Research on Location of Multi-Level Network Distribution Centers

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.97-98.653 ◽

2011 ◽

Vol 97-98 ◽

pp. 653-658

Author(s):

Ying Wu ◽

Yi Lu ◽

Yang Li

Keyword(s):

Genetic Algorithm ◽

Mixed Strategy ◽

Service Level ◽

Distribution Center ◽

Location Model ◽

Practical Case ◽

Distribution Centers ◽

Advantages And Disadvantages ◽

Multi Level

This paper studies the time matter in distribution center’s service level, states a model’s preconditions and constructs a location model of multi-level disribution center which concerns the time matter. In solution, it studies the advantages and disadvantages of genetic algorithm, proposes a mixed strategy, designs the HGA program and studies the application of HGA in the location model of distribution center. In the end , it shows the practicality and correctness the proposed methods and models by the application in the practical case.

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