William M. Goble – författare

This book describes the design phase of the SIS safety life cycle as defined in IEC 61511:2016. Starting with a description of the entire safety life cycle process, the authors show how the design steps fit into that process starting with conceptual design through design verification. The book explains the advantages of the performance-based approach to design and provides the theoretical background for the probabilistic calculations that are the foundation of performance verification. The book also explains minimum redundancy concepts and equipment qualification. By providing numerous examples, the authors explain potentially confusing language from IEC 61511 and IEC 61508. Appendices include statistics, probability, failure-rate data tables, and system architectures. Each chapter contains questions and answers similar to those found on professional certification exams for functional safety, which makes the book a valuable resource for those seeking to achieve personnel certification.

This book describes the design phase of the SIS safety life cycle as defined in IEC 61511:2016. Starting with a description of the entire safety life cycle process, the authors show how the design steps fit into that process starting with conceptual design through design verification. The book explains the advantages of the performance-based approach to design and provides the theoretical background for the probabilistic calculations that are the foundation of performance verification. The book also explains minimum redundancy concepts and equipment qualification. By providing numerous examples, the authors explain potentially confusing language from IEC 61511 and IEC 61508. Appendices include statistics, probability, failure-rate data tables, and system architectures. Each chapter contains questions and answers similar to those found on professional certification exams for functional safety, which makes the book a valuable resource for those seeking to achieve personnel certification.

Control Systems Safety Evaluation & Reliability explains how engineers measure and improve the safety and reliability of control systems used in process industries. It explores how failures occur (stress versus strength), and how to model and measure reliability and safety using tools such as probability, histograms, fault trees, reliability block diagrams and Markov models. Furthermore, it examines how diagnostics, common-cause failures and software faults impact system performance. This book guides readers through practical tools, including failure modes and effects analysis (FMEA) and failure modes, effects and diagnostic analysis (FMEDA), as well as software reliability models and lifecycle costing. It balances theory with real-world examples, demonstrating how to build effective models, compare architectures and estimate the financial impact of design choices. Overall, it serves as a practical reference for students and practitioners aiming to understand and evaluate control system safety quantitatively.