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Abstract
System safety is the application of engineering and management principles, criteria, and techniques to achieve acceptable mishap risks. As modern rotorcraft designs become ever more complex, system safety becomes ever more essential. System safety typically reduces mishap risks through analyses that identify and address potential system failure modes. Documents such as MIL-STD-882, SAE ARP4754, SAE ARP4761, and the Federal Aviation Administration (FAA) System Safety Handbook guide the various analyses that are performed in the system safety process. The use of these analyses to reduce mishap risks is not new, but case studies indicate that if the system safety process is applied to influence rotorcraft designs earlier in the product life cycle, schedule slippage and cost escalation resulting from design changes can be substantially reduced. In addition, earlier completion of system safety analyses permits corrective actions to be implemented at a higher level in the system safety order of design precedence, which increases the effectiveness of the corrective actions and reduces residual risk. This paper provides examples that will encourage earlier completion of system safety analyses by demonstrating the cost and schedule advantages, as well as the expected safety risk reduction.

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  Advantages of Early System Safety Influence

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