In any software design project, the analysis stage - documenting and designing technical requirements for the needs of users - is vital to the success of the project. This book provides a thorough introduction and survey to all aspects of analysis, including design of E-commerce systems, and how it fits into the software engineering process. The material is based on successful professional courses offered at Columbia University to a diverse audience of advanced students and professionals. An emphasis is placed on the stages of analysis and the presentation of many alternative modeling tools that an analyst can utilize. Particular attention is paid to interviewing, modeling tools, and approaches to building effective web-based E-commerce systems.