Tham khảo tài liệu 'risk analysis for engineering 15', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | CHAPTER Risk Analysis in Engineering and Economics fGE DATA FOR RISK STUDIES A. J. Clark School of Engineering Department of Civil and Environmental Engineering 8a Risk Analysis for Engineering Department of Civil and Environmental Engineering University of Maryland College Park chapman hAll CRC CHAPTER 8a. DATA FOR RISK STUDIES Slide No. Introduction H Data are needed to perform quantitative risk assessment or provide information to support qualitative risk assessment. The relevant information for risk assessment include - possible failures -failure probabilities - failure rates -failure modes - possible causes CHAPTER 8a. DATA FOR RISK STUDIES Slide No. Introduction -failure consequences and - uncertainties associated with the system and its environment. In the case of a new system data may be used from similar systems if this information is available. Statistical analysis can be used to assess confidence intervals and uncertainties in estimated parameters of interest. CHAPTER 8a. DATA FOR RISK STUDIES Slide No. Introduction Generally data can be classified as -failure probability data and - failure consequence data. The data if available or existing provide a history of a system or components of the system. In the case of a new system data could be interpolated or extrapolated from existing information on similar systems. CHAPTER 8a. DATA FOR RISK STUDIES Slide No. Introduction Also the data can be based on information from known components that comprise the new system. In cases where similar systems are nonexistent expert opinion elicitation can be employed. CHAPTER 8a. DATA FOR RISK STUDIES Slide No. Data Sources Figure 1 shows a hierarchy of data sources and their usability. Preexisting data can be modified to reflect the stresses of the intended application. If the preexisting data provide information needed based on identical items in identical environment and application the preexisting can be transferred into database for performing risk analyses.
