Engineering Critical Assessment (ECA) of offshore pipeline systems is a complex and challenging process. The potential for fatigue and fracture of pipeline welds needs to be assessed at the design stage to ensure that the integrity of a pipeline system is maintainedduring its installation and for its full life cycle. This book brings a holistic view of ECA in a way that is accessible to both young engineers and experienced practitioners. The book presents a consolidated approach to ECA based on an understanding that has been developed in Subsea7 by internal R&D, adherence to codes and standards, and through advanced application of assessment strategies. Throughout the book, the authors bring their detailed practical experience and knowledge to all aspects of offshore pipeline ECA.