This book provides a thorough introduction to analysis and where it fits into the software engineering process. Throughout, the author is concerned to emphasize the stages of analysis and to identify many alternative modelling tools that an analyst can use. Particular emphasis is placed on Joint Application Development and on prototyping. Readers are assumed to have a reasonable understanding of computer concepts and terminology. The book will be suitable for a first-level analysis course or it can be used by information systems professionals who need an in-depth understanding of the principles of the analysis and design process.