... are semi‐automatic and controlled. Warehouse space assignment Workload balancing Pre‐batching Mixed‐integer programming Warehouses Batch manufacturing Storage Storage systems Vertical storage Pre‐batching activities in some process industries like the fine chemicals‐, pharmaceuticals...

... The results imply that human learning should be considered in planning the order picking process, for example in designing the layout of the warehouse or in setting up work schedules. Originality/value The paper is the first to study learning effects in order picking systems, and one of the few papers...