THE PROCESS OF RISK ANALYSIS

QRA can be used to investigate many types of risks associated with chemical process facilities, such as the risk of economic losses or the risk of environmental impact. But, in health and safety applications, the use of QRA can be classified into two categories  

Estimating the long-term risk to workers or the public from chronic exposure to potentially harmful substances or activities 

Absolute and relative risks Major risk contributors Comparisons with other risks 

In this guide, we will focus on the use of QRA in the safety assessment of acute hazards and episodic events only. 

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Figure 5 is an example of a decision tree you may find useful when considering QRA for particular process safety applications. The decision tree illustrates a flowchart of questions you can ask yourself (or others) to decide how far through the process of risk analysis to go to satisfy a need for increased risk understanding. 

Risk is defined as the combination of the expected frequency and consequence of accidents that could occur as a result of an activity. Risk analysis is a formal process of increasing one s understanding of the risk associated with an activity. The process of risk analysis includes answering three questions ... 

The process of risk analysis consists of three individual circles risk assessment, risk management and risk communication. They are all linked to each other and even overlap in tasks. Proper functioning of this process is of key importance. 

It is necessary then the implementation of decision systems that seek to contribute to the process of risk analysis, whether involving questions of technical aspects on evaluation and measurement, aspects of risk management and the influence of the environment in risk situations. Brito Almeida (2009) proposed a multicriteria decision model to rank pipeline sections into a risk hierarchy, considering three risk dimensions human, environmental and finance. 

As it was mentioned the operator performance is influenced by the human and organizational factors. If they are properly shaped can contribute significantly to mitigating the human error probability (HEP) and failure events that result in decreasing the risk related to accidents scenarios identified in the process of risk analysis. 

Therefore, Part I of this text focused primarily on the development of system safety, its military connections, the importance of including system safety requirements in contract acquisitions, the criticality of obtaining management commitment in support of the system safety effort, the process of risk analysis and assessment, probability theory and statistical analysis as they relate to system safety, and— perhaps of most value— how the fundamental principles of system safety are closely related to those of occupational safety and health management. 

The process of risk analysis for water consumer safety occurs in the following phases of reconnaissance ... 

Procedures of collision avoidance action are based on the COLREGs. The research considered that Rule 5 included the process of risk identification Rule 7 (a), (b), and (c), the process of risk analysis Rule 7 (d), the process of risk evaluation Rule 8 (a) and (b), the process of risk treatment Rule 8 (d), the process of monitoring and review. In restricted visibility, Rule 19 (d) first paragraph included the process of risk analysis Rule 19 (d) (i), (ii) and 19 (e), the process of risk treatment. 

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