Batching customer orders in a warehouse can result in considerable savings in order pickers’ travel distances. Many picker-to-parts warehouses have precedence constraints in picking a customer order. In this paper a joint order-batching and picker routing method is introduced to solve this...

Sequencing unit load retrieval requests has been studied extensively in literature for conventional single-deep automated warehousing systems. A proper sequence can greatly reduce the makespan when carrying out a group of such requests. Although the sequencing problem is NP-hard some very good...

In the past thirty years the full turnover-based storage policy as described by Hausman et al. (1976, Management Science 22(6)) has been widely claimed to outperform the commonly used ABC class-based storage policy, in terms of the resulting average storage and retrieval machine travel time. In...

In the last decades, many retailers have started to combine traditional store deliveries with fulfilment of online sales to consumers, from omnichannel warehouses, which are increasingly automated. One popular way of warehouse automation is with Autonomous Mobile Robots (AMRs), that collaborate...

Improving on existing products is an effective product differentiation strategy for firms. We refer to such improved products as next-generation products (NGPs). Research shows that 40% of product transitions fail and that some lead to bankruptcies. Bad timing is often mentioned as one of the...

In this paper method and practice of cross-efficiency calculation is discussed. The main methods proposed in the literature are tested not on a set of artificial data but on a realistic sample of input-output data of European warehouses. The empirical results show the limited role which...