In the last years, new solutions for order picking systems have been developed both from industry and academics, especially for small items. They include innovative flexible automatic parts-to-picker systems and optimized picker-to-parts ones. One of these solutions consists in the use of Vertical Lift Modules (VLMs), a storage column in which small items are stored in extractable trays. In this paper, we study a new system composed by dual-tray VLMs where the operators perform picking and sorting activities. We propose several actions in order to improve the productivity of the entire system: 1) class based storage assignment of items inside the VLMs; 2) batch retrievals of items and 3) batch orders and batch retrievals with pick-and-sort activity. The impacts of these actions are evaluated with a simulation of the system using real data from an industrial case
Progress in Material Handling Research: 2016
Battini, Daria; Calzavara, Martina; Persona, Alessandro; and Sgarbossa, Fabio, "Dual-tray Vertical Lift Modules for Fast Order Picking" (2016). 14th IMHRC Proceedings (Karlsruhe, Germany – 2016). 6.