Zonal hazard analysis

The engineering methods and techniques used for demonstrating the satisfaction of equipment safety requirements (e.g Fault Tree Analysis, Event Tree Analysis, Zonal Hazard Analysis etc.) are relatively well understood by the wider safety engineering community compared with those for people and procedures and will therefore not be discussed further here. The remainder of this paper will discuss how the above approach to safety requirements specification and realisation can be developed in the case of human-based subsystems, using Human Factors methods and techniques. 

Zonal safety analysis (ZSA)/Zonal hazard analysis (ZHA)... 

The zonal hazard analysis techniques are also used to assess the effects of the proliferation of hazards into adjacent physical areas or compartments. They can be used to identify the routes by which the hazards may spread and in so doing, solutions can be developed to control and mitigate the effects of the hazard. 

This step involves the Safety Engineer highlighting to the Test Pilot and/or the HF Specialist all failure conditions identified via techniques such as the Functional Hazard Analysis (FHA) (Chapter 3), Failure Modes and Effects Analysis (EMEA) (Chapter 5), Common Mode Analysis (CMA) (Chapter 6), Particular Risk Analysis (PRA) (Chapter 7) and Zonal Safety Analysis (ZSA) (Chapter 8). 

Functional hazard analysis is the airline industry s name for hazard analysis. Failure mode and effects analysis and fanlt tree analysis are applied in the same way as in other industries. Zonal analysis is the verification of correct manufacture and installation. It starts by reviewing drawings and analysis and ends in the physical inspection of mockup, prototype, and production systems. 

Hazard analysis focuses on the study of characteristics of a fire and its impact on humans and property at the set scenario, which includes a set of basic data on room geometry, parameters for the center of the fire, conditions of ventilating apertures, a starting position of people in the building, etc. Here, deterministic mathematical (integrated, zonal or differential) or physical (full-scale or reduced in sizes) fire models are used. Research focuses on quantitative data, environment characteristics of fire and explosion scenarios, its striking action and potential property damage. 

The tsunami hazard may be determined a priori by the ratio of r = l.(kd>), where k is the significance coefficient of a zonal or local factor at the risk formation, and co is the weight of contribution of the specific type of a factor into the formation of risk for all factors. As a result, a rather clear linear (or weak parabolic) dependence between the values of r and run-up heights were established. This dependence becomes more convex at the analysis of the relationship between the values r and the values of horizontal runup of tsunami waves. 

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