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primary topic: Dynamic Order-Based Scheduling Algorithms for Automated Retrieval System in Smart Warehouses

Dynamic Order-Based Scheduling Algorithms for Automated Retrieval System in Smart Warehouses
type: AcademicArticle
type: Article
abstract: In typical e-commerce warehouse operations, upon receiving the orders from customers, the purchased items need to be retrieved from shelves and then packaged accordingly for delivery. To automate and speed up the item retrieval process, a Smart Warehouse usually employs a management system, called the Automated Retrieval System (ARS), to control and schedule the retrieval jobs. The working principle of ARS is crucial to the Smart Warehouse because it will have a great impact on the subsequent downstream processes. In short, all the items in a particular order should be considered as an integral part; if one of these items encounters a much larger retrieval delay than others do, then the entire order may experience an unnecessary latency. In the past, the integrality of order has not received much attention for the parallel retrieval process of multiple stackers. To take this into account, this paper proposes using an Order Tag to label all the items that belong to the same order for retrieval job scheduling. The way of calculating the Order Tags will then determine the scheduling discipline of the ARS. With the objectives of minimizing the average delay and ensuring the fairness, two algorithms are proposed. They are named as Dynamic Order-Based (DOB) and Dynamic Order-Based with Threshold (DOBT) Scheduling Algorithms, respectively. Compared with the First-Come-First-Serve and other approaches, the simulation results show that DOB and DOBT are able to reduce the average order retrieval delay by at least 30, and generate less backlog pressure to the downstream operations. © 2013 IEEE.
date: 2021
volume: 9
status: peerReviewed
status: published
author list: authors
type: EPrint
type: ArticleEPrint
is part of: repository

Institute of Electrical and Electronics Engineers Inc.
type: Organization

IEEE Access
type: Collection

Jialei Liu
type: Person
given name: Jialei
family name: Liu

Boonyaik Yaik Ooi
type: Person
given name: Boonyaik Yaik
family name: Ooi

Soung Yue Liew
type: Person
given name: Soung Yue
family name: Liew

Donghong Qin
type: Person
given name: Donghong
family name: Qin

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primary topic: Dynamic Order-Based Scheduling Algorithms for Automated Retrieval System in Smart Warehouses