Title: The effect of slot-code optimisation on travel times in common unit-load warehouses

Authors: Andrea Fumi; Laura Scarabotti; Massimiliano M. Schiraldi

Addresses: Department of Engineering and Management, 'Tor Vergata' University of Rome, Via del Politecnico, 00133, Rome, Italy ' Department of Engineering and Management, 'Tor Vergata' University of Rome, Via del Politecnico, 00133, Rome, Italy ' Department of Engineering and Management, 'Tor Vergata' University of Rome, Via del Politecnico, 00133, Rome, Italy

Abstract: The main aim of this paper is to estimate material handling times reductions in one-block unit-load warehouse organised with an optimal slot-code allocation, rather than with a uniform pick/store locations distribution, while comparing single and dual-command cycles from a travel distance perspective; results are calculated through multiple what-if analysis based on random scenarios simulations assuming variable input/output positions and warehouse shapes. Simulations helped in the effective quantification of travel times reductions, gaining a result of extreme importance for those manufacturing, distribution and retailing companies which aim at both designing their warehouse and determining the right type and number of transportation resources. Because of currently used warehouse management systems (WMS), companies do not reckon so needful of existing literature relying on uniform pick/store distribution: this paper seems the first to address a precise estimation of material handling times when fast-movers items are more or less effectively placed nearby warehouses entrance.

Keywords: single command cycles; dual command cycles; travel distance; random product allocation; optimised product allocation; one-block warehouses; unit-load warehouses; materials handling; slot-code allocation optimisation; storage assignment; travel times; simulation; fast-moving items.

DOI: 10.1504/IJSOM.2013.054925

International Journal of Services and Operations Management, 2013 Vol.15 No.4, pp.507 - 527

Published online: 28 Apr 2014 *

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