Re-marshalling in automated container yards with terminal appointment systems

Covic, Filip

doi:10.1007/s10696-017-9278-6

Cited by 27 publications

(5 citation statements)

References 19 publications

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“…Then, the large number of transport operators (Marchet, Perotti, and Mangiaracina 2012) and the massive flows of containers (Meng, Weng, and Suyi 2017;Jeevan and Roso 2019;Mommens, van Lier, and Macharis 2017) can be better handled and managed Figure 14 shows how each of the five identified access management services can address the challenges identified above. With all the access management services (except for the automated gate services), the planning and coordination activities in the pre-access phase can be effectively performed that in turn can minimize the following identified challenges: unnecessary movements and needless container stacking in terminals (Steenken, Voß, and Stahlbock 2004;Mutters 2019), vehicles arriving unannounced (Covic 2017), and poor activity performance and poor resource utilization (Sternberg et al 2013).…”

Section: Discussionmentioning

confidence: 99%

“…The pre‐access phase deals with challenges such as unnecessary movements and pointless container stacking at terminals (Steenken, Voß, and Stahlbock 2004), and poor utilization of resources due to bad resource planning (Sternberg et al 2013). Such needless movements and container stacking typically occur when trucks arrive unannounced, which prevents terminals from planning for their arrival (Covic 2017). In fact, studies have shown that a whopping 85–90 percent of import containers are needlessly moved and that 60–84 percent of export containers are needlessly stacked (Steenken, Voß, and Stahlbock 2004; Mutters 2019).…”

Section: Introductionmentioning

confidence: 99%

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Managing Terminal and Transport Processes with Access Management Services

Jacobsson¹

2023

Transportation Journal

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Given the massive flows of containers that mega vessels deliver to seaport freight terminals, the terminal and transport operators face major accessibility and congestion challenges. To address those challenges, five information services, named as access management services, are identified that can mobilize interorganizational information flows to achieve effective terminal and transport processes. In those processes, previous research has examined the effects of such services only in the access phase, that is, when containers are loaded and/or unloaded, leaving out the potential effects in the pre- and post-access phases. Consequently, the purpose is to clarify how the five identified access management services can affect activities and resources for all three access phases in the terminal and transport processes. Two empirical studies were performed: a prestudy, which involved 30 observations to identify terminal and transport processes in a seaport terminal, and an improvement study, which involved eight interviews and four focus groups to explain how the processes can be managed effectively. Access management services that can exchange information in real time can perform and utilize the activities and resources in all three access phases effectively. Namely, with the services, effective loading and unloading require fewer movements, drivers, administrators, controllers and less container lifting.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Managing Terminal and Transport Processes with Access Management Services

Jacobsson¹

2023

Transportation Journal

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“…This problem is not yet well studied, partially because an assumption of the CPMP is that moving the crane between bays is not possible or costly for pre-marshalling operations. We refer to the review of Caserta et al (2011) and the publication of Covic (2017), who compares different features of existing re-marshalling algorithms with his own contribution.…”

Section: Container Terminalsmentioning

confidence: 99%

Solving the unit-load pre-marshalling problem in block stacking storage systems with multiple access directions

Pfrommer¹,

Meyer²,

Tierney³

2022

Preprint

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Block stacking storage systems are highly adaptable warehouse systems with low investment costs. With multiple, deep lanes they can achieve high storage densities, but accessing some unit loads can be time-consuming. The unit-load pre-marshalling problem sorts the unit loads in a block stacking storage system in off-peak time periods to prepare for upcoming orders. The goal is to find a minimum number of unit-load moves needed to sequence a storage bay in ascending order based on the retrieval priority group of each unit load. In this paper, we present two solution approaches for determining the minimum number of unit-load moves. We show that for storage bays with one access direction, it is possible to adapt existing, optimal tree search procedures and lower bound heuristics from the container pre-marshalling problem. For multiple access directions, we develop a novel, two-step solution approach based on a network flow model and an A* algorithm with an adapted lower bound that is applicable in all scenarios. We further analyze the performance of the presented solutions in computational experiments for randomly generated problem instances and show that multiple access directions greatly reduce both the total access time of unit loads and the required sorting effort.

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“…Zhong et al [17] combined AGV conflictfree path planning with quay and rail-mounted gantry cranes to schedule multi-AGV. Covic [18] proposed an online rule-based method to re-marshal problems with and without terminal appointment systems.…”

Section: Introductionmentioning

confidence: 99%

Model of Twin Automatic Stacking Crane Operation Strategy with Dynamic Handshake Area in an Automated Container Terminal

Putri

Rusdiansyah

Nurminarsih

2023

jti

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This paper proposes a new idea for allocating a handshake area of an automated container yard. A block of automated container yards (CY) consists of two areas, which are the import (waterside) and export (landside) areas. The CY has two major activities (loading and unloading), where both are served by Twin Automatic Stacking Cranes (Twin-ASCs). A handshake area in the middle of the CY serves as a temporary slot for both ASCs. This situation causes an imbalance between the ASCs when the demands of each side differ significantly. Thus, we proposed using a dynamic location of the handshake area corresponding to the proportion demand of export and import containers. We developed a heuristics model and algorithms of ASC’s operations to compare the efficiency of the ASC operations between the fixed and the dynamic location. Based on our model and algorithm, we developed simulation software. Finally, we explored some numerical experiments to compare the performance of both policies in dealing with different export and import demand scenarios. Our result showed that the proposed approach outperformed the existing one in reducing unnecessary ASC movements.

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Re-marshalling in automated container yards with terminal appointment systems

Cited by 27 publications

References 19 publications

Managing Terminal and Transport Processes with Access Management Services

Managing Terminal and Transport Processes with Access Management Services

Solving the unit-load pre-marshalling problem in block stacking storage systems with multiple access directions

Model of Twin Automatic Stacking Crane Operation Strategy with Dynamic Handshake Area in an Automated Container Terminal

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