A warehouse management system (WMS) is an IT system that supports the control, monitoring and optimisation of warehouse and distribution systems. The elementary functions of warehouse management include quantity and storage location management as well as conveyor control and disposition. In addition, the scope of services of a WMS according to this approach also includes extensive methods and means for monitoring system states and a selection of operating and optimisation strategies. The task of a WMS is therefore the management and optimisation of internal warehousing systems.