All plants are designed and operated to be safe. Yet accidents happen. In all cases, the root cause of the accident was that an uncontrolled change took place. This book explains the meaning of the word "change" in the context of process plants, how change can be managed, and what needs to be done to meet regulatory requirements, particularly the OSHA process safety standard, 29 CFR 1910.119. Learn how a) Organize and run a Management of Change program. b) Understand and define Safe Operating Limits. c) Incorporate the informal aspects of change management. d) Link Management of Change with other elements of process safety.