WIT Press

Safer By Design: Towards A Conceptual Assessment Of Safety


Free (open access)

Paper DOI






Page Range

105 - 116




447 kb


C. de Zanna, M. van Tooren, J. Schut, J. Stoop & R. Curran


The expected number of airplanes flying is increasing every year. By 2025, U.S. commercial air carriers are projected to fly 2.1 trillion available seats per mile and transport 1.3 billion passengers for a total of 1.7 trillion passenger miles. Furthermore regional carriers are growing faster than mainline carriers (3.8 vs. 2.8 percent a year). This means that if aviation safety does not keep improving, the accident rate will probably increase. Furthermore, studies show that at least 20% of the root causes of accidents arise in the design stages and when safety problems are discovered later on, they are often difficult and expensive to resolve. For these reasons, a methodology has been developed that enables the evaluation of conceptual aircraft design from a safety point of view. It is an approach for conducting a structured analysis that can assess and quantify safety and risks of design features for conceptual aircraft design. In this paper it will be shown that the most important advantage of this methodology is to allow designers to evaluate and compare the total effect of different design options on safety during the conceptual design of aircraft. Keywords: aircraft safety, risk and safety assessment, conceptual design, functions analysis, hazard scenarios.


aircraft safety, risk and safety assessment, conceptual design,functions analysis, hazard scenarios