2.5 PSA and SST Safety ("Hazard") and "Risk" Models
INTERNAL BIBLIOGRAPHIES/INDEXES NOTE
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Includes bibliographical references.
CONTENTS NOTE
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Intro; Preface; References; About This Book; Introduction; References; Contents; Abbreviations; 1 Assessing the System Safety Using Reliability Theory and PSA Methods; 1.1 Formation of Methods for Ensuring Reliability and Safety of Equipment as Quality Characteristics; 1.2 Basic States of Facilities in the Reliability and Safety Analysis; 1.3 Interrelationship Between the Categories of Reliability, Efficiency, and Safety of Complex Technical Systems in the Classical Reliability Theory; 1.4 Structurally Complex Diagrams of the Technical System and Minimal Cut Sets of Failures
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1.4.1 Methods for Assessing Reliability and Quality of Systems1.4.2 Constructing a "Failure Tree"; 1.5 Basic Principles of Ensuring Safety of Technical Systems Based on the Classical RT Methods; 1.5.1 Use of Safety Barriers to Ensure Safety of Potentially Hazardous Facilities; 1.5.2 Place and Role of Probabilistic Safety Analysis (PSA) in the RT; 1.5.3 Identification of Risk Factors; 1.5.4 International Standards in the Field of Safety Analysis and Evaluation (PSA) and Comments on Discrepancies in Language; 1.5.5 Identification of Main Tasks of Probabilistic Safety Analysis
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1.6 Analysis of Emergency Sequences When Assessing the Safety Level of Systems Using the PSA Method in the RT1.6.1 Construction of "Event Trees" in the RT; 1.6.2 Calculation of Risks in the RT as the Probability of Occurrence of a Negative Event; 1.6.3 Analysis of the Results of Risk Calculation in the PSA Method; 1.7 Failure Mode Effects and Criticality Analysis (FMECA); 1.7.1 General Provisions of Failure Mode Effects and Criticality Analysis for System Element Failures; 1.7.2 Effect of the Failure Criticality on the Safety State of the System Processes; 1.7.3 Examples of Known Catastrophes
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1.8 ConclusionsReferences; 2 New Doctrine "Reliability, Risk, Safety" for System Safety (Flight Safety) Assessment on The Basis of the Fuzzy Sets Approach; 2.1 New Doctrine for Assessing Safety of Structurally Complex Aviation Technical Systems Using Fuzzy Subsets; 2.2 Multicriteria Estimation of the Complex Quality Index on the Tuple of Parameters; 2.2.1 Multicriteria Index and Alternative Methods; 2.2.2 Main RRS General Provisions; 2.2.3 General Methodical RRS Recommendations on the Development of Tools for Assessing Risks in Systems as "Measure of Hazard."
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2.2.4 The Main Problems of the Classical RT2.2.5 Possible Ways of Assessing System Safety Indicators with Risk-Based Methods; 2.2.6 Relation of Some Parameters from RT and SF into SST; 2.3 Generalized RT and SST Provisions in the RRS; 2.3.1 Interpretations of the Initial Concepts of Risk on the Basis of the Games Theory (Differences in the Classical RT and SST Concepts); 2.3.2 Mathematical Basis of Risk Models as a "Risk Measure" (According to the RAS); 2.4 Mathematical Basis for the Definition of a Risk Event and an Integral Measure of Risk in the Probability Space
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SUMMARY OR ABSTRACT
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This book provides a solution to "rare event" problems without using the classical theory of reliability and theory of probability. This solution is based on the methodology of risk assessment as "measure of danger" (in keeping with the ICS RAS) and an expert approach to determining systems safety indications using Fuzzy Sets methods. Further, the book puts forward a new concept: "Reliability, Risks, and Safety" (RRS). The books main goal is to generalize present results and underscore the need to develop an alternative approach to safety level assessment and risk management for technical (aviation) systems in terms of Fuzzy Sets objects, in addition to traditional probabilistic safety analysis (PSA). The concept it proposes incorporates ICAO recommendations regarding proactive system control and the systems responses to various internal and external disturbances.