There are dozens of Unified Modeling Language (UML) books, but virtually all of them assume their readers have significant experience with modeling or object-oriented development. Not this one. Written by the co-author of the best selling UML Distilled, this book is utterly authoritative -- and it's also the simplest, least technical guide to UML ever written. With it, every participant in the modeling process can learn to master UML, starting from scratch. Begin by understanding the real value of modeling in software development and other endeavors, and how UML was explicitly designed to support iterative and incremental processes. Watch a project team use UML to identify the real-world objects associated with their business problem; capture scenarios that describe user actions and system responses ("use cases"); and define a system's functional requirements. Learn how UML helps teams identify relationships amongst objects that must be implemented to address a system's requirements. Next, use UML to describe business and process workflows; to determine how all of a system's objects will work together; and to specify how a distributed software system will actually be built.