Travel distance estimation and storage zone optimization in a 2-block class-based storage strategy warehouse

Storage policies and order picking strategies in U-shaped order-picking systems with a movable base

“…The high cost impact of order picking is caused by the fact that orders are picked manually in many companies, which renders the travelling time of an order picker a critical factor in the overall efficiency of the warehouse (Bartholdi and Hackmann 2002). Changes in the competitive environment, such as high time pressure and variations in the demand pattern of the customers, induce companies to search for strategies that simultaneously reduce the costs and increase the speed of their order picking systems (Le-Duc and de Koster 2005). Researchers have proposed various strategies for designing the layout of a warehouse and for performing the order picking process and have shown that adopting a sophisticated order picking strategy may significantly reduce warehouse operating costs.…”

Determining the number of zones in a pick-and-sort order picking system

“…Parikh and Meller (2008) develop analytical models to estimate blocking in an order picking system with wide picking aisles. For small (up to 2-blocks) class-based storage warehouses, Le-Duc and De Koster (2005) propose a travel time model and a local search procedure for determining optimal storage zone boundaries as well as the number of storage aisles. Gue and Meller (2006) propose two innovations in warehouse design, diagonal cross aisles and picking aisles having different orientations, to increase order picking throughput.…”

Picking Path Optimization in Dual Zone Type Warehouse Based on Genetic Algorithms

“…So for the selection of y value is the form of a-b, where a represents the order batches, and b represents the order picking equipment. For example, a chromosome coding [6][7][8] :…”