In manual and semi-automated order picking systems, one of the challenges consists in minimizing picker blocking. One of the ways to prevent picker blocking is to have wide-isles warehouses. Although this solution solves part of the problem, pick-face blocking remains a challenge. Technological...

Scheduling problems occur in a broad range of real-world application fields and have attracted a huge set of research articles. However, there is only little research on exact algorithms for scheduling problems, many of which are NP-hard in the strong sense. We investigate the problem on a...