An integrated model for the design of end-of-aisle order picking system and the determination of unit load sizes of AGVs

Hwang, Hark; Moon, Seong-Woo; Gen, Mitsuo

doi:10.1016/s0360-8352(02)00058-x

Cited by 28 publications

(14 citation statements)

References 6 publications

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“…As a result, the design of the AS/RS is completely subordinate to the assembling processes in the facility. Hwang et al (2002) consider the design of miniload AS/RSs in combination with Automated Guided Vehicles. Both a non-linear model and heuristics have been proposed to determine the optimal number of loads to be transferred by each AGV to machines in combination with an optimal design of the AS/RS.…”

Section: Physical Designmentioning

confidence: 99%

A survey of literature on automated storage and retrieval systems

Roodbergen

Vis

2009

European Journal of Operational Research

503

208

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Automated Storage and Retrieval Systems (AS/RSs) are warehousing systems that are used for the storage and retrieval of products in both distribution and production environments. This paper provides an overview of literature from the past 30 years. A comprehensive explanation of the current state of the art in AS/RS design is provided for a range of issues such as system configuration, travel time estimation, storage assignment, dwell point location, and request sequencing. The majority of the reviewed models and solution methods are applicable to static scheduling and design problems only. Requirements for AS/RSs are, however, increasingly of a more dynamic nature for which new models will need to be developed to overcome large computation times and finite planning horizons, and to improve system performance. Several other avenues for future research in the design and control of AS/RSs are also specified.

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Section: Physical Designmentioning

confidence: 99%

A survey of literature on automated storage and retrieval systems

Roodbergen

Vis

2009

European Journal of Operational Research

503

208

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“…This provides intangible long term benefits like possibility to accommodate ageing workforce, better outcomes like decreased workplace injuries, staff turn-over, medical leave rates, etc. [26,27] Formal published research evidence in healthcare setting for this is however scarce, these can be explored in a separate study. They can be timed to precision, increasing predictability of medical supplies which is imperative for hospital operations, and can also be optimized to carry multiple department's supplies simultaneously thus improving productivity.…”

Section: Discussionmentioning

confidence: 99%

Technology in healthcare: A case study of healthcare supply chain management models in a general hospital in Singapore

Mittal

Maw

Soong

2017

JHA

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Objective: To simulate and compare a manual hospital supply chain management model versus a process that is technologically integrated (either by Radio Frequency Identification [RFID] technology or automated guided vehicles [AGVs]), in a general hospital in Singapore. Methods: Design: Deterministic modelling of hospital supply chain management for manual and technologically integrated processes as part of the institutional quality improvement exercise. Setting: Study was conceptualised during re-location of a 355-bed general hospital to newer premises within Singapore with an increased capacity of 700 beds. Study duration was 1.5 years and data collection was performed from Sep 2014 to Sep 2015. Results: Automating the inventory check and use of automated guided vehicles for medical supplies can improve business and operational performance by saving time on no-value added activities that can be transferred to patient care. RFID intervention requires least number of man-hours per day reducing the total manpower requirements by about one third as compared to the manual process while improving productivity by about 40%, it also provides cost savings of about 25% over a period of 10 years. Sensitivity analysis shows that extent of these cost savings are dependent on overall staff utilisation. Although use of AGV alone is expensive in our model, combining AGVs with RFID technology provides the least manpower dependence among the different interventions studied, it also gives a positive return on investment as compared to manual process beyond 3 years of operations. Conclusions: Optimising supply chains within healthcare helps minimise manpower dependency and costs. However, prior to adopting a specific intervention, the unique characteristics of each healthcare setting should be considered. There is need for similar research into healthcare supply chains to identify key determinants to cost savings and improving productivity, both locally and regionally.

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“…Foley and Frazelle (1991) have developed an exact solution for the S/R machine travel time under the FCFS retrieval policy in order to evaluate the throughput for the miniload AS/RS. Hwang et al, (2002) proposed the design of miniload AS/RSs in combination with Automated Guided Vehicles. To recognize the optimal number of loads transferred by each AGV to machines, a non-linear model and heuristics have been developed in their research.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Specifically, they addressed the problem of optimal storage assignment with considering two main policies: randomized storage and class-based storage. (Hwang et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Simulation based Performance Analysis of an End-of-Aisle Automated Storage and Retrieval System

Bahrami

Aghezzaf

Limère

2014

Proceedings of the 3rd International Conference on Operations Research and Enterprise Systems

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Abstract:This paper presents and discusses simulation of an End-of-Aisle automated storage and retrieval system, using FLEXSIM 6. The objective of the simulation model is to analyze and compare results of different control policies and physical designs. The performance measures considered for the evaluation of each control policy and layout combination are the total travel time of the crane and the number of storage and retrieval operations performed. The experiments set up and the corresponding results are discussed.

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An integrated model for the design of end-of-aisle order picking system and the determination of unit load sizes of AGVs

Cited by 28 publications

References 6 publications

A survey of literature on automated storage and retrieval systems

A survey of literature on automated storage and retrieval systems

Technology in healthcare: A case study of healthcare supply chain management models in a general hospital in Singapore

Simulation based Performance Analysis of an End-of-Aisle Automated Storage and Retrieval System

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