Model Based Approach to Zonal Safety Analysis
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Abstract
Zonal Safety Analysis (ZSA) is an analysis technique for assessing the safety of complex systems however current tools limit its repeatability, thoroughness and time efficiency. The model based method proposed in this paper remedies these limitations.
Zonal Safety Analysis is widely used in the aerospace industry with similar analysis techniques also seen in the design of offshore oil & gas systems, mining equipment, defence platforms and other high-risk systems. The importance of ZSA comes from its ability to allow the designer to analyse the spread of hazards through the system from a physical standpoint. This is done by dividing the system into zones and understanding how hazardous forms of energy or material (e.g. fire or oil) could spread between these zones. This paper suggests a method for tracking the spread of hazards using a model of the system that can automatically generate the potential propagation of the hazards. To give the designer a better understanding of the source of the hazard, and greater flexibility in preventing it from occurring, the causes of these hazards are also defined in the model. Using a model based approach allows the analysis process to be efficiently repeated for a design variant at any stage in the product lifecycle by updating the structure (i.e. different components/configuration) or parameters (i.e. hazard causes, criticality) of the system model.
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