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Risk analysis methods
In the implementation of railtrack infrastructure, increasingly greater attention is being focused on the complex of requirements in the areas of reliability, availability, maintainability and safety. These four aspects constitute the main components of a "RAMS Analysis". The first step of work here is identification and evaluation of possible dangers in a "Preliminary Hazard Analysis". The next step is to break down the system to be studied into individual components and assemblies, and to classify them structurally. On the basis of this system structure, it is then possible to conduct a "Failure Mode Effect Criticality Analysis". After assessment of the risks in the individual assemblies, classification of components and assemblies then follows in the form of assignment to critical and less critical categories. Within the context of "Fault Tree Analysis", it is possible to superimpose these individual errors and to continue to track them. Finally, "Hazard Closeout Statements" are prepared for assessment of the hazard potentials that have been identified. This procedure assures that all imaginable hazards will be critically examined, and that first priority will be accorded to preventing their occurrence. Excerpts from the individual steps are presented here, using the example of the RHEDA 2000® ballastless track system.
Ever-shorter lead times for the completion of new railway Pines are necessitating a shift away from processes based on the division of tasks. Such requirements can only be met safely and efficiently in the reality of construction site operation by using integrated process design.
Efficient and high-quality manufacture of slab track entails using specific methods for surveying and setting up that function reliably in construction site conditions. The methods described in the article can be used both for all monolithic designs (eg Rheda) and for slab track designs with elastic-mounted sleepers (eg Bözberg, Euroblock); at the same time, they open up new possibilities for construction site logistics. These industrial-type working methods were successfully used to lay 126 km of slab track on the new Cologne - Rhine/Main line.