Leon Starr's book is a practical guide. It starts from the beginning by explaining the essentials of the method and it illustrates the implications of these essentials as they apply in practice. The book contains a wealth of examples drawn from real-worl experience, and these examples are used to make concrete the abstractions you encounter in real projects. The book tells you, and shows you, how to build useful models quickly. There is a good deal of excellent advice on how to manage your own analysis activities to get the most useful models for the least work.