This book explains how to apply the most modern systems engineering modeling approaches not only to products, processes and business enterprises, but also to the description of the process of systems engineering. The result is an easily understood description of the systems engineering process which can be tailored to the many methodologies, notations and tools that compete for adoption. The book provides an engineering basis for: specification of near-optimal products and processes; tailoring the systems engineering process to commercial or aerospace projects; selection of a specific methodlogy and notation; selection and development of tools for automation; and training students in a systems development disciplines.