This text provides an introduction to the process of software engineering. The revision concentrates on updating the book to reflect the most current trends and innovations in the field. The Universal Modeling Language (UML) has become an industry standard and now permeates this new edition. In this text, it is used for object-oriented analysis and design as well as when diagrams depict objects and their interrelationships. Design patterns, frameworks and software architecture have also become a popular topic in the field of software engineering and are part of a new chapter on reuse, portability, and inoperability. The inoperabilty material includes sections on such hot topics as OLE, COM, and CORBA. Some material from the 3rd edition has been reorganized into a new chapter on planning and estimating, including feature points and COCOMO II. While the text has been updated, the traditonal features which have defined the previous three editions of Schach's book have been retained. These include a balanced coverage of the object-oriented model along with the classical model (as reflected in the title) and an emphasis on metrics. The special considerations of object-oriented life-cycle models, object-oriented analysis, and object-oriented design are also retained in this edition.