RAMS-FC. . In the context of the characterization of the RAMS parameters of a system, four categories of failure can be defined that identify different consequences for the railway operation: “Significant-immobilizing failure”, a significant failure that determines traffic blockage or a considerable delay, generates significant unexpected costs; “Major service failure”, an important failure that causes circulation disturbance, must be eliminated to allow the regular service, does not generate significant costs; “Minor”, failure that does not prevent circulation from being carried out; “Negligible”, a negligible failure that does not affect circulation
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