Analytical models for a new turnover-based hybrid storage policy in unit-load warehouses

Abstract

This paper considers a low-level unit-load warehouse employing single-deep storage lanes and a single-command manual storage and retrieval policy. Analytical travel distance models are developed for class-based and full turnover storage policies under across-aisle, within-aisle and a newly proposed hybrid product placement schemes. Our computational studies show that the analytical models developed in this paper are very accurate as compared to simulation results and a comparative study with a real-world warehouse case. Hybrid storage policies proposed in this paper outperform all other traditional storage policies. The paper also presents insights and simple design rules to warehouse practitioners.

Research on storage location classification model based on EIQ analysis

“…In the research on location optimization, Wang M pointed out that location allocation is the starting point of the warehousing process, and the result of location allocation will affect the subsequent links 1 .De Kostermbm, Neuteboom pointed out that in the retail warehouse, each kind of goods should be corresponding to the storage location one by one, which is the positioning storage strategy 2 .Petersen C G studied the storage of different goods in an area 3 .RaoSS, Adil G K proposed a new hybrid storage strategy. The calculation shows that the hybrid storage strategy is different from other traditional storage strategies 4 .…”

Stochastic models of routing strategies under the class-based storage policy in fishbone layout warehouses

“…Zhou et al 50 improved the class-based storage strategy through an association algorithm and proved that the improved class-based storage strategy is better than the traditional ABC class-based storage strategy. Furthermore, De Koster et al 9 , Rao et al 51 , Žulj et al 43 have also studied storage strategies for the traditional layout, while Pohl et al 52 , Çelik et al 10 , Venkitasubramony et al 53 , Bortolini et al 32 , and Accorsi et al 31 have done so for non-traditional layouts.…”

Estimating optimal ABC zone sizes in manual warehouses

“…Eynan and Rosenblatt (1994) extend the (Hausman et al, 1976) procedure to optimally determine zone boundaries for 𝑛 classes. Rao and Adil (2017) also develop analytical models to find an optimal partitioning point in a two-zone system, but considering that storage location assignments are determined using a heuristic storage policy. Similar procedures are also presented for different systems, such as for a 3D compact automated system (Yu and de Koster, 2009), a livecube compact system (Zaerpour et al, 2017), and a warehouse with diagonal cross aisles (Bortolini et al, 2019).…”