Hazard Modelling for Electronic Systems in Railway Operation and Control

In this paper, the use of hazard models for electronic systems in railway operation and control is discussed. The focus is laid on how such a model can be used in order to supply the required information and on providing an argument structure in a safety case according to CENELEC standards EN 50126-1 and EN 50129. The main goal is an explicit depiction of the hazards in a functional and technical context in order to increase the quality of a safety case as well as an easier assessment of electronic systems in railway operation and control.