This newly revised best-seller is ideal for instrumentation and control system engineers in the process industries who are responsible for specifying, designing, analyzing, installing, and maintaining safety instrumented systems. Engineers, managers, technicians, and sales professionals employed by end users, engineering firms, system integrators, and consultants can all benefit from the material presented here. Safety Instrumented A Lifecycle Approach addresses the realization that today’s process plants—and the systems used to control them—are capable of large-scale destruction. The risks involved now are so great that the luxury of learning from trial and error experience no longer exists. This book is a practical how-to text covering the specification, design, analysis, programming, installation, maintenance, and management of change of safety instrumented systems.