Human beings design and develop systems with which to achieve specific goals. Systems engineering is the art and science of transforming identified needs or opportunities into systems that fulfill them, effectively and efficiently, throughout their operational lives. The sustainment in operational condition of the fielded systems is essential and requires of a number of logistics activities, traditionally carried out in an unstructured manner. The advent of systems engineering meant the application of the systems approach to the field of logistics, resulting in the philosophy known as integrated logistics support. This book explains the concept and origin of the discipline of integrated logistics support and addresses its elements, explaining the meaning and role of each one, as well as their inter-relationships. In addition to the logistics support elements, two essential disciplines (reliability and ergonomics) are covered. The goal of the book it to facilitate a solid foundation for the application of the integrated logistics support philosophy throughout the entire life cycle of a system, from the formulation of logistics support-related requirements, to the simultaneous design of the system and its associated logistics support elements. The book is written with a combination academic rigor and with the pragmatic touch of a very large industry background.