Given that our primary focus is to teach VUI design, we chose to organize it according to the design methodology we recommend. The parts are as follows:
Part I, introduction: Chapters 1 3 provide the necessary introductory material, including an overview of voice user interfaces and design issues, a description of the technology, and a high-level view of the design methodology we detail throughout the remainder of the book.
Part II, definition phase: Chapters 4 7 cover the definition phase of a project: discovering the requirements and making high-level design decisions that will guide the detailed design.
Part III, design phase: Chapters 8 14 cover the detailed design phase. Design principles are covered in detail, with many examples of how to apply them to real applications.
Part IV, realization phase: Chapters 15 18 cover the realization phase: development, testing, and tuning. A number of issues that are unique to voice user interface design, such as grammar development, are covered in detail.
Each part begins with a chapter covering the methodological details for that phase of design. Following that are a few chapters describing the design principles and approaches relevant to that phase. The final chapter of each section presents a design example.