How you define your project scope and functional requirements can make or break your software project. Use case analysis helps you do both well. It provides an unequivocal definition of functional scope. It also provides excellent traceability over the course of your project, agile or otherwise, from discovery through all subsequent stages and iterations. Most importantly, use case analysis serves as a Rosetta Stone for your entire project team, providing a unified understanding of the system across all the disciplines that contribute to your project's success. This book presents a brief introduction to use case analysis and how you can employ it in developing interactive software. Widely used in the industry, use case analysis can take many different forms. This book presents one view in a concise volume suitable for helping you and your project team find unison in the approach you might want to pursue.