In production logistics, the supermarket serves as an interim warehouse for articles which will be needed in upcoming production steps. Since increasingly flexible production processes are making advance long-term planning of demand more and more difficult, the state-of-the-art factory solution is to monitor the dolly hubs inside the supermarket. Intelligent sensors automatically detect when a dolly is removed from a hub or fed into a monorail track and communicate this information in real time, providing a digital visualisation of the stock. Requisitions are signalled automatically on the basis of preconfigured criteria, guaranteeing that the necessary parts are always available.