An exploration of cutting-edge approaches for evaluating the usability of complex user interaction, this book focuses on improving design and communicating content to the end user. The book continues the conversation about the evolution of usability, asking how we can design and evaluate these complex systems and the complex work they support. It describes and analyzes approaches to teaching, testing, analyzing, or managing usability studies - approaches that involve technical communicators making novel contributions to how we think about and evaluate increasingly complex systems.