Modeling Safety Case Evolution – Examples from the Air Traffic Management Domain

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Abstract

In order realistically and cost-effectively to realize the ATM (Air Traffic Management) 2000+ Strategy, systems from different suppliers will be interconnected to form a complete functional and operational environment, covering ground segments and aerospace. Industry will be involved as early as possible in the lifecycle of ATM projects. EUROCONTROL manages the processes that involve the definition and validation of new ATM solutions using Industry capabilities (e.g., SMEs). In practice, safety analyses adapt and reuse system design models (produced by third parties). Technical, organisational and cost-related reasons often determine this choice, although design models are unfit for safety analysis. This paper is concerned with evolutionary aspects in judging safety for ATM systems. The main objective is to highlight a model specifically targeted to support evolutionary safety analysis. The systematic production of safety analysis (models) will decrease the cost of conducting safety analysis by supporting reuse in future ATM projects.