Safety Instrumented System Design Techniques and Design Verification

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.

Iwan van Beurden, MSc, CFSE, serves as Chief Technology Officer and Director of Product Development at exida, a global leader in research, training, product certification, and system consulting for safety-critical and high-availability systems.
With more than 20 years of professional experience in the functional safety field, van Beurden is responsible for the development, maintenance, and certification of the exSILentia integrated safety life cycle tool and associated products at exida.
He performs IEC 61508 development support, IEC 61511 life cycle services, functional safety assessments, and a variety of reliability analyses. He is an ISA Fellow and a member of the ISA S84 committee, and teaches exida and ISA training classes.
van Beurden is a Certified Functional Safety Expert (CFSE). He has published dozens of papers and magazine articles. He holds a master of science degree from Eindhoven University of Technology in Eindhoven, the Netherlands, where he majored in reliability engineering and graduated cum laude.

William M. Goble, PhD, PE, CFSE, is Managing Director and Cofounder of exida, a company that engages in research, training, product certification, and system consulting for safety-critical and high-availability systems. He has developed probabilistic analysis methods for functional safety that are widely used today. He has more than 40 years of experience in control systems, including product development, marketing, training, and functional safety certification.
Goble received a BS in electrical engineering from Penn State University, an MS in electrical engineering from Villanova University, and a PhD in reliability engineering from Eindhoven University of Technology. He is a registered professional engineer in the State of Pennsylvania and a Certified Functional Safety Expert (CFSE). He is an ISA Fellow. He has written hundreds of technical articles and several best-selling books on functional safety.