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Regular and urgent ordering with lateral transshipment in a distribution network with stochastic pre-ordered and peddling demands 具有随机预购和兜售需求的配送网络中的定期和紧急订购与横向转运
IF 3.3 Q2 TRANSPORTATION Pub Date : 2025-03-01 DOI: 10.1016/j.ajsl.2025.01.004
Chalida Donjuk , Jirajat Settasuk , Po-ngarm Somkun
We propose inventory replenishment and lateral transshipment policies for a distribution network. The distribution centers place weekly regular orders and daily urgent orders to the factory. Two classes of stochastic demands, pre-ordered and peddling, cause either backlogging or lost sales when they are not satisfied. The policy was simulated using data from a case study. The results showed that the proposed policies reduced the total cost, which includes transportation costs for satisfied demands and lateral transshipment, back order and lost sale costs for unsatisfied demands, and inventory holding costs. The best policy reduced long-run total cost and was proved robust from sensitivity analysis. Finally, implementing the policy with the case study confirmed 9.97 % total cost reduction and its practical application.
我们建议库存补充和横向转运政策的分销网络。配送中心每周向工厂下常规订单,每天向工厂下紧急订单。两类随机需求,即预购和兜售,在无法得到满足时,要么导致积压,要么导致销售损失。使用案例研究中的数据对该策略进行了模拟。结果表明,所提出的策略降低了总成本,包括满足需求和横向转运的运输成本、未满足需求的延迟订单和销售损失成本以及库存持有成本。最优策略降低了长期总成本,并通过敏感性分析证明了其鲁棒性。最后,通过案例研究证实了该政策的实施,总成本降低了9.97 %,并进行了实际应用。
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引用次数: 0
Towards sustainable energy selection for ships in response to maritime regulation 根据海事法规,为船舶选择可持续能源
IF 3.3 Q2 TRANSPORTATION Pub Date : 2025-03-01 DOI: 10.1016/j.ajsl.2024.11.005
Mohammed Mojahid Hossain Chowdhury , Md. Mostafa Aziz Shaheen , Khandaker Rasel Hasan , Arif Mahmud , Kazi Khaled Mahmud
Ship owners and operators are continuously seeking financially viable ways to comply with the Sulphur emission limits set out by the IMO, which calls for a reduction of sulphur content in ship fuel to less than 0.5 % in 2020. The prudent decision in managing required energy sources by shipowners/operators will lead to an efficient ship operating decision, subsequently resulting in long-term financial return. The study aims to identify the factors influencing ship owners and operators to select the energy types in operating their vessels. Furthermore, the research explores the most desired energy sources to address the IMO Sulphur Cap Regulations 2020. One operation research method, namely the Preference Ranking Organization Method for Enrichment Evaluation (PROMETHEE), and one econometrics tool, namely the conditional logit model, have been used to explore the research objectives. The PROMETHEE analysis suggests that clean fuel (VLSFO) is the best alternative to respond IMO 2020, followed by scrubber installation. The conditional logit analysis suggests almost the same, indicating clean fuel as the only alternative for responding to regulation. The decision is driven by the vessel's age negatively and the size of the vessel positively. The study will enormously impact the ship’s energy procurement practices in Bangladesh.
船东和经营者一直在寻求经济上可行的方法,以遵守国际海事组织制定的硫排放限制,该限制要求在2020年将船舶燃料中的硫含量减少到0.5% %以下。船东/运营商在管理所需能源方面的审慎决策将导致有效的船舶运营决策,从而产生长期的财务回报。本研究旨在找出影响船东及营运人在营运船舶时选择能源类型的因素。此外,该研究还探讨了最理想的能源,以满足2020年国际海事组织硫上限条例的要求。运用运筹学方法PROMETHEE (Preference Ranking Organization method for Enrichment Evaluation)和计量经济学工具条件logit模型(conditional logit model)来探索研究目标。PROMETHEE分析表明,清洁燃料(VLSFO)是应对IMO 2020的最佳选择,其次是安装洗涤器。条件logit分析的结果几乎相同,表明清洁燃料是应对监管的唯一选择。船龄对决定的影响为负,船的大小对决定的影响为正。这项研究将极大地影响该船在孟加拉国的能源采购实践。
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引用次数: 0
Supplier selection through an integrated multi-criteria decision-making model: A study on barge service providers in the Mekong Delta of Vietnam 基于综合多准则决策模型的供应商选择:越南湄公河三角洲驳船服务供应商研究
IF 3.3 Q2 TRANSPORTATION Pub Date : 2025-03-01 DOI: 10.1016/j.ajsl.2024.11.002
Manh-Tan Le , Thien-Vu Tran
The logistics industry become one of the most rapidly growing sectors, primarily attributed to Vietnam’s economic development. Most domestic transportation relies on road mode instead of inland waterways transport (IWT). With a long coast and large river country, Vietnam’s transportation should advocate for waterborne systems. This study investigates the barge service providers in the Mekong Delta region (MDR) in southern Vietnam ̶ the focal economic development zone of Vietnam. Using qualitative and quantitative approaches, we employ an integrated multiple-criteria decision making (MCDM) method to estimate the best-fitting barge service providers. Accordingly, we recommend some policy implications for the MDR sustainable economic growth.
物流业成为增长最快的部门之一,主要归因于越南的经济发展。大多数国内运输依赖公路方式,而不是内河水路运输(IWT)。越南拥有漫长的海岸和广阔的河流,交通运输应提倡水运系统。本研究调查了越南南部湄公河三角洲地区(MDR)的驳船服务提供商——越南的重点经济开发区。采用定性和定量方法,我们采用综合多标准决策(MCDM)方法来估计最合适的驳船服务提供商。据此,我们提出了一些政策建议,以促进可持续经济增长。
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引用次数: 0
Workplace frustration leading to task deviation and accidents at sea – A sociocultural perspective on the maritime human element 职场挫折导致的任务偏差和海上事故——海事人文因素的社会文化视角
IF 3.3 Q2 TRANSPORTATION Pub Date : 2025-03-01 DOI: 10.1016/j.ajsl.2025.01.001
Asanka Rajapakse, Gholam Reza Emad
Seafaring continues to be risky despite the tremendous international effort to curb maritime accidents. While onboard, seafarers, as the principal human element in the maritime industry, must face myriad physical and mental stresses and dynamic safety challenges. So far, many of these challenges have remained out of the scope of the maritime industry and research communities. Our earlier research addressed some human element-related challenges, including time constraints, fatigue and performing simultaneous tasks. This study addresses a crucial element that has yet to be adequately researched: seafarers' frustration at their workplace. It is essential because managing the high rate of maritime accidents due to task deviation and its underlying factor of frustration has been a significant challenge for the governing authorities of the maritime industry. This research constitutes a significant qualitative investigation, utilising interviews to explore an underlying factor contributing to maritime accidents. We show that workplace frustration is a significant cause of task deviation, leading to dangerous situations at sea. This paper presents four reasons for frustration at sea: physical hardship in conducting a task, social isolation, working with undesirable people, and severed expectations. Additionally, the main steps that the maritime industry can take to mitigate seafarers’ frustration at sea are recommended.
尽管国际社会为遏制海上事故作出了巨大努力,但航海仍然存在风险。海员作为海运业的主要人员,在船上必须面对无数的身心压力和动态安全挑战。到目前为止,这些挑战中的许多仍然超出了海事行业和研究界的范围。我们早期的研究解决了一些与人为因素相关的挑战,包括时间限制、疲劳和同时执行任务。这项研究解决了一个尚未得到充分研究的关键因素:海员在工作场所的挫折感。这是至关重要的,因为管理由于任务偏离及其潜在的挫折因素而导致的高海上事故率一直是海运业管理当局面临的重大挑战。本研究构成了一项重要的定性调查,利用访谈来探索导致海上事故的潜在因素。我们表明,工作场所的挫折是任务偏差的重要原因,导致海上危险情况。本文提出了海上受挫的四个原因:执行任务的身体困难,社会孤立,与不受欢迎的人一起工作,以及切断期望。此外,还建议了航运业可以采取的主要步骤,以减轻海员在海上的挫败感。
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引用次数: 0
A study on fuzzy-AHP analysis for carbon neutrality in container terminals in Korea 韩国集装箱码头碳中和的模糊层次分析法研究
IF 3.3 Q2 TRANSPORTATION Pub Date : 2025-02-20 DOI: 10.1016/j.ajsl.2025.02.003
Hyun-Woo Kim , Yong-Seok Choi , Jae-Eun Lee
The purpose of this study was to investigate the relative importance of determinants that should be considered first in order for container terminals to realize carbon neutrality and become an eco-friendly port. Three upper determinants and 12 lower determinants were derived through the two-stage Delphi survey to derive questionnaire items. The factors determined by the container terminal operation experts were surveyed, and priorities were identified using the Fuzzy-Analytic Hierarchy Process(Fuzzy-AHP) technique. As a result, the importance of the top three priority factors was evaluated in the order of improvement of laws and systems, energy efficiency, and low-carbon infrastructure construction, confirming that to realize carbon neutrality at container terminals, it was necessary to first consider improving laws and systems that reflected realistic problems. According to the results of the priority analysis, the introduction of energy-saving equipment, the introduction of the AMP mandatory system, the provision of incentives to realize carbon neutrality, the establishment and implementation of low-carbon port policies, and the implementation of carbon-bearing regulatory measures, which are sub-factors of legal and institutional improvement, which were the highest importance of the top factors, ranked 2nd to 5th.
本研究的目的是调查集装箱码头实现碳中和并成为环保港口应首先考虑的决定因素的相对重要性。通过两阶段德尔菲调查,推导出3个上决定因素和12个下决定因素。对集装箱码头运营专家确定的影响因素进行了调查,并利用模糊层次分析法(Fuzzy-AHP)确定优先级。因此,按照完善法律制度、提高能效、低碳基础设施建设的顺序,对前三个优先因素的重要性进行了评价,确认要实现集装箱码头的碳中和,首先要考虑完善反映现实问题的法律制度。根据优先度分析的结果,节能设备的引进、AMP强制性制度的引入、实现碳中和的激励措施的提供、低碳港口政策的制定和实施、含碳监管措施的实施是法律和制度完善的子因素,在top因素中重要性最高,排名第2 - 5位。
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引用次数: 0
The analysis of gaps in inter-organizational networks of international freight forwarders 国际货运代理组织间网络的缺口分析
IF 3.3 Q2 TRANSPORTATION Pub Date : 2025-02-17 DOI: 10.1016/j.ajsl.2025.02.002
Hee-Sung Bae
This study analyzes the gaps in inter-organizational network between market uncertainty (MU) and organizational uncertainty (OU) within the international freight forwarding industry in Korea. The measurement factors are developed based on previous studies. 54 questionnaires were completed by Korean international freight forwarders. Reliability of the data is identified by factor analysis, and the validity is tested by Cronbach’s alpha. The hypothesis is verified as follows: the sample firms are classified into four clusters by cluster analysis on the basis of MU and OU, the gaps in inter-organizational network among the four clusters are tested by analysis of variance, and real gaps are identified by post hoc analysis. The results indicated a high level of inter-organizational network among clusters with both a high level and a low level of MU and OU. International freight forwarders in these clusters maintained long-term and collaborative relationships with partners through their networks. Therefore, multinational enterprises (MNEs) seeking to enter the market may benefit from forming a network with Korean international freight forwarders through agency contracts rather than through foreign direct investment (FDI).
本研究分析了韩国国际货代行业组织间网络中市场不确定性(MU)与组织不确定性(OU)之间的差距。测量因子是在前人研究的基础上发展起来的。54份问卷由韩国国际货运代理完成。采用因子分析确定数据的信度,采用Cronbach’s alpha检验数据的效度。对假设进行了验证:基于MU和OU的聚类分析将样本企业分为四类,通过方差分析检验四类企业间组织间网络的差距,并通过事后分析识别实际差距。结果表明,集群间的组织间网络水平较高,集群间的组织间网络水平也较低;这些集群中的国际货运代理通过其网络与合作伙伴保持长期的合作关系。因此,寻求进入市场的跨国企业(MNEs)可能会受益于通过代理合同而不是通过外国直接投资(FDI)与韩国国际货运代理形成网络。
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引用次数: 0
Factors affecting the safety climate of the ship's crew: Empirical evidence from shipping companies in Indonesia 影响船员安全气候的因素:来自印度尼西亚航运公司的经验证据
IF 3.3 Q2 TRANSPORTATION Pub Date : 2025-02-14 DOI: 10.1016/j.ajsl.2025.02.001
Larsen Barasa, Marihot Simanjuntak , Budi Wahyu Syafitra
This research examines the factors that influence the safety climate in the maritime industry, focusing on employee competence, use of safety equipment, and safety training in Indonesian shipping companies. The research proposes that variations in ship operations contribute to different levels of difficulty and quality of work, with implications for a varying safety climate. The analysis technique used Exploratory Factor Analysis (EFA) and Ordinary Least Squares (OLS) regression with 4 dimensional indicators namely competence, use of safety tools, safety training, and safety climate. The results showed that there is a positive and significant influence between employee competence, use of safety equipment, and safety training on the safety climate in Shipping Companies in Indonesia. The findings indicate the importance of investing in comprehensive safety training and the provision of adequate safety equipment as key factors in improving the safety climate for policy making in the maritime industry to create a safe and productive work environment.
本研究考察了影响海运业安全气候的因素,重点关注印尼航运公司的员工能力、安全设备的使用和安全培训。研究表明,船舶操作的变化会导致工作难度和质量的不同,从而影响不同的安全气候。分析技术采用探索性因子分析(EFA)和普通最小二乘(OLS)回归,并采用4个维度指标,即能力、安全工具的使用、安全培训和安全气候。结果显示,员工能力、安全设备的使用和安全培训对印尼航运公司的安全气候有显著的正向影响。调查结果表明,投资于全面的安全培训和提供足够的安全设备是改善海运业决策安全环境以创造安全和富有成效的工作环境的关键因素。
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引用次数: 0
Selection supplier for Textile and Garment enterprises in Vietnam using association rules 利用关联规则为越南纺织服装企业选择供应商
IF 3.3 Q2 TRANSPORTATION Pub Date : 2024-11-18 DOI: 10.1016/j.ajsl.2024.11.003
Thi Ha Dinh , Thi Thu Thuy Nguyen , Thi Thanh Tam Do , Thi Van Trang Nguyen , Hung Long Nguyen , Van Thanh Do
The research aims to investigate the support suppliers’ decision making for Textile and Garment Vietnamese Enterprises based on using association rules mining. In order to increase the competitive advantage over other enterprises, Vietnamese enterprises are gradually shifting their production methods from CMT (Cut-Make-Trim) to FOB (Free On Board), ODM (Original Design Manufacturing), and OBM (Original Brand Manufacturing). One of the important steps for this transformation is to be self-sufficient in sourcing raw materials from selected suppliers with sufficient capabilities, meeting the requirements of price, and CSR (corporate social responsibility) to enable Vietnamese enterprises to enjoy tax incentives. The Vietnamese Enterprises participate in the textile and garment production process through importing raw materials from other countries such as China, Korea, etc. Therefore, the selection supplier issue is very important to them to enhance their business products. This study researches on finding positive ARs and negative ARs in Textile and Garment data domain via three scenarios to define the relationship of alternative criteria for selection suppliers. By using alternative method of ARM (Association Rule Mining), the experimental results show that Textile and Garment enterprises in Vietnam appreciate the CSR factor highly. This is completely in line with the previous survey research on the new factor in the supplier selection criteria of Textile and Garment enterprises in Vietnam. In another word, in this field, the CSR plays as an important role to reflect company’s image and it is the first of decision choice. The other criteria are considered after including Cost, Quality, and Delivery respectively. The remain factors of Service, Capability, Relationship, and Sourcing Country are not highly evaluated via the experiments. With different scenarios along with the association rules mined, they reflect different sets of criteria that textile and garment enterprises use to select their suppliers. Furthermore, the rare rules show situations that are very unlikely but have high reliability in reality. Based on the findings, the factors will show the essentials for suppliers to improve themselves to meet the requirements.
本研究旨在利用关联规则挖掘法研究越南纺织服装企业的供应商决策支持。为了提高相对于其他企业的竞争优势,越南企业正逐步将其生产方式从 CMT(裁剪-制作-修整)转变为 FOB(船上交货)、ODM(原始设计制造)和 OBM(原始品牌制造)。这一转变的重要步骤之一是自给自足,从选定的有足够能力的供应商那里采购原材料,满足价格和企业社会责任(CSR)的要求,使越南企业能够享受税收优惠。越南企业通过从中国、韩国等其他国家进口原材料参与纺织服装生产过程。因此,选择供应商问题对他们提升业务产品非常重要。本研究通过三种情景来确定选择供应商的备选标准的关系,从而在纺织服装数据域中发现正的 ARs 和负的 ARs。通过使用关联规则挖掘(ARM)的替代方法,实验结果表明越南的纺织服装企业非常重视企业社会责任因素。这与之前关于越南纺织服装企业供应商选择标准中新因素的调查研究完全一致。换言之,在这一领域,企业社会责任在反映公司形象方面发挥着重要作用,是决策选择的第一要素。其后考虑的其他标准分别包括成本、质量和交货期。剩下的服务、能力、关系和采购国等因素在实验中的评价并不高。不同的情景和挖掘出的关联规则反映了纺织服装企业选择供应商的不同标准。此外,稀有规则还显示了现实中不太可能出现但可靠性很高的情况。根据研究结果,这些因素将显示供应商为满足要求而进行自我改进的必要条件。
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引用次数: 0
Why is demurrage important for logistics companies using container terminals? An analysis of the determinants of demurrage and its impact on firm performance 为什么滞期费对使用集装箱码头的物流公司很重要?分析滞期费的决定因素及其对公司业绩的影响
IF 3.3 Q2 TRANSPORTATION Pub Date : 2024-11-18 DOI: 10.1016/j.ajsl.2024.11.001
Hyoseon Kim, Hyuksoo Cho
During the COVID-19 pandemic, severe demurrage in shipping and container terminals has led to a global logistics crisis and supply chain disruptions. Although the situation is gradually stabilizing, discussions persist on strategies to reduce volatility in container freight transportation. Demurrage imposes unnecessary costs, delays deliveries, and impedes the efficiency of container terminals. This study analyzes the factors influencing demurrage from the perspective of logistics companies, specifically, based on the characteristics of logistics companies and the attributes of the cargo owners they serve. Additionally, it explores the impact of demurrage levels on firm performance and investigates how this relationship may be moderated by container terminal characteristics. The empirical findings indicate that advancements in information systems within logistics companies, along with improved collaboration and contract compliance among cargo owners, can significantly reduce demurrage. This reduction in demurrage can enhance firm performance. Furthermore, credibility management and digitization of shipping documents also play a crucial role in minimizing demurrage. Building on previous research and empirical insights, this study emphasizes the importance of sustained long-term investment and policy support from the government for the digital transformation of logistics processes, complementing the efforts of both logistics companies and cargo owners.
在 COVID-19 大流行期间,航运和集装箱码头的严重滞期导致了全球物流危机和供应链中断。虽然情况正在逐步稳定,但有关减少集装箱货运波动的战略的讨论仍在继续。滞期费带来了不必要的成本,延误了交货,阻碍了集装箱码头的效率。本研究从物流公司的角度分析了影响滞期费的因素,特别是基于物流公司的特点及其服务的货主的属性。此外,本研究还探讨了滞期费水平对公司业绩的影响,并研究了集装箱码头特征如何调节这种关系。实证研究结果表明,物流公司内部信息系统的进步,以及货主之间合作和遵守合同情况的改善,可以显著降低滞期费。滞期费的减少可以提高公司业绩。此外,航运单据的可信度管理和数字化在减少滞期费方面也发挥着至关重要的作用。基于以往的研究和经验见解,本研究强调了政府为物流流程数字化转型提供持续的长期投资和政策支持的重要性,这对物流公司和货主的努力都是一种补充。
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引用次数: 0
The effect of employee competence and competence – job – fit on business performance through moderating role of social exchange: A study in logistics firms 通过社会交换的调节作用看员工能力和能力-工作-契合度对企业绩效的影响:物流企业研究
IF 3.3 Q2 TRANSPORTATION Pub Date : 2024-11-05 DOI: 10.1016/j.ajsl.2024.10.001
Nhu-Mai Thi Nong , Nguyen Quynh Phuong , Ha Duc-Son
Improving business performance is an important task for all businesses, including the logistics industry. However, at present, there are few studies on the influence of employee competence and competence-job-fit on business performance, in which employee performance and job satisfaction are mediating variables and social exchange is moderating the relationships between employee competence and employee performance and job satisfaction. This research gap will be solved by the authors in this research to achieve the goal of improving the performance of enterprises. Quantitative research method is applied in the research. Data were collected through survey from 181 logistics enterprises in Ho Chi Minh City. The author believes that the research results will contribute significantly to the success of promoting the performance of logistics enterprises as well as to the theoretical basis of employee competence, competence-job fit, job satisfaction, employee performance, and business performance.
提高企业绩效是包括物流业在内的所有企业的一项重要任务。然而,目前关于员工胜任力和胜任-工作匹配度对企业绩效影响的研究很少,其中员工绩效和工作满意度是中介变量,而社会交换则是调节员工胜任力与员工绩效和工作满意度之间关系的中介变量。作者将在本研究中解决这一研究空白,以实现提高企业绩效的目标。本研究采用定量研究方法。通过对胡志明市 181 家物流企业的调查收集数据。作者相信,研究成果将对成功促进物流企业绩效以及员工胜任力、胜任力与工作契合度、工作满意度、员工绩效和企业绩效的理论基础做出重大贡献。
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引用次数: 0
期刊
Asian Journal of Shipping and Logistics
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