The increasing usage of distributed diagnostic components goes hand in hand with a growing demand for a central diagnostic system. A central diagnostic system enables the railway operator to establish the current status of a monitored overall system in real time, display the data in a clearly structured manner, diagnose all connected systems, and thus document operability of the overall system. Sidis Workstation (Sidis WS) is a holistic, central, cloud-based application for diagnostics and prediction developed for just this purpose.