Travel-time models and fill-grade factor analysis for double-deep multi-aisle AS/RSs

Xu, Xianhao; Zou, Bipan; Shen, Guwen; Gong, Yeming

doi:10.1080/00207543.2015.1106604

Cited by 14 publications

(6 citation statements)

References 21 publications

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“…Other rearrangement rules include rearranging to a random location and rearranging to a deterministic point. The rearrangement to the nearest location rule performs the best in terms of expected rearrangement time (Xu et al, 2016). In a flow-rack AS/RS, unit-loads are stored on the flow racks' storage face, and slided down to the retrieval face where the retrieving process is processed.…”

Section: Blocking Rearrangement and Conflict-free Routingmentioning

confidence: 99%

A literature review of smart warehouse operations management

Zhen

2022

Front. Eng. Manag.

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E-commerce, new retail, and other changes have highlighted the requirement of high efficiency and accuracy in the logistics service. As an important section in logistics and supply chain management, warehouses need to respond positively to the increasing requirement. The “smart warehouse” system, which is equipped with emerging warehousing technologies, is increasingly attracting the attention of industry and technology giants as an efficient solution for the future of warehouse development. This study provides a holistic view of operations management problems within the context of smart warehouses. We provide a framework to review smart warehouse operations management based on the characteristics of smart warehouses, including the perspectives of information interconnection, equipment automation, process integration, and environmental sustainability. A comprehensive review of relevant literature is then carried out based on the framework with four perspectives. This study could provide future research directions on smart warehouses for academia and industry practitioners.

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Section: Blocking Rearrangement and Conflict-free Routingmentioning

confidence: 99%

A literature review of smart warehouse operations management

Zhen

2022

Front. Eng. Manag.

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“…Studying similar AS/RS, Xu [35] proposed a double-deep and multi-aisle automatic storage system. The system is based on a random storage strategy and rearrangement of blocking loads.…”

Section: Scheduling Commandsmentioning

confidence: 99%

Shuttle-Based Storage and Retrieval System: A Literature Review

2022

Sustainability

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While the e-commerce logistics industry is developing rapidly, its sustainable development has received certain attention. The ultimate goal of sustainable development is to achieve common, coordinated, fair, efficient, and multi-dimensional development. To promote the sustainable development of logistics, the automation technology of warehousing is undoubtedly an excellent breakthrough, since the automation technology can not only make the warehousing system efficient and with a low-error rate, but also affect the energy consumption of the warehousing system. This paper studies the Shuttle-Based Storage and Retrieval System (SBS/RS) in automated warehousing. Moreover, the paper classifies the existing literature into three categories: Physical design (including depth, configuration, and number of tiers); control strategy (including scheduling rules, storage strategies, scheduling command, and interference); and performance evaluation (including throughput, time, and energy). These categories are all factors that warehouse designers must consider when designing a system. Finally, this paper proposes future research directions for SBS/RS: Adding speed metrics, limiting buffer size, targeting space constraints, applying four-way shuttles, and increasing the carrying capacity of a single machine.

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“…Xu et al [4] used the single-shuttle as the benchmark model to analyze the improvement of the dual-shuttle and developed a "quadruple command" analytical model to evaluate the system efficiency. According to three different rearrangement rules, Xu et al [21] proposed cycle time models under singleand dual-command. Their study also illustrated the relationship between the fill-grade factor and the total cost.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Based on [21,22], the expected value of the rearrangement operation distances of the DMSWS can be calculated by Equation 12:…”

mentioning

confidence: 99%

Task Scheduling Problem of Double-Deep Multi-Tier Shuttle Warehousing Systems

Zhan

Ling

2020

Processes

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Double-deep multi-tier shuttle warehousing systems (DMSWS) have been increasingly applied for store-and-retrieval stock-keeping unit tasks, with the advantage of a reduced number of aisles and improved space utilization. Scheduling different devices for retrieval tasks to increase system efficiency is an important concern. In this paper, a Pareto optimization model of task operations based on the cycle time and carbon emissions is presented. The impact of the rearrangement operation is considered in this model. The cycle time model is converted into a flow-shop scheduling model with parallel machines by analyzing the retrieval operation process. Moreover, the carbon emissions of the shuttle in the waiting process, the carbon emissions of the lift during the free process, and the carbon emissions of the retrieval operation are considered in the carbon emissions model, which can help us to evaluate the carbon emissions of the equipment more comprehensively during the entire retrieval task process. The elitist non-dominated sorting genetic algorithm II (NSGA-II) is adopted to solve the non-linear multi-objective optimization function. Finally, a real case is adopted to illustrate the findings of this study. The results show that this method can reduce carbon emissions and improve system efficiency. In addition, it also help managers to reduce operational costs and improve the utilization of shuttles.

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Travel-time models and fill-grade factor analysis for double-deep multi-aisle AS/RSs

Cited by 14 publications

References 21 publications

A literature review of smart warehouse operations management

A literature review of smart warehouse operations management

Shuttle-Based Storage and Retrieval System: A Literature Review

Task Scheduling Problem of Double-Deep Multi-Tier Shuttle Warehousing Systems

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