1. A safety-analysis system comprising: a system modeler configured to receive component fault-based models of respective components of which a system is composed, the component fault-based models including transfer functions expressed as fault trees each of which describes behavior of a respective component in an event of a failure of the respective component or of an input to the component, wherein the system modeler is configured to assemble the component fault-based models into a system fault-based model of the system, the system fault-based model including a transfer function expressed as an assembly of the fault trees of the component fault-based models; and a model-analysis system configured to perform a safety analysis using the system fault-based model.