User Roles: Highlighting similarities and differences between users. Capturing stories: interviews, questionnaires, observations, workshops. Working with managers, trainers, and sales staff. The only German book specifically dedicated to User Stories. A User Story is a software requirement formulated in everyday language. It is intentionally kept short and typically consists of no more than two sentences. User Stories are used in Extreme Programming (XP) to specify requirements. The User Story is the most important method for managing an agile project. But what does an optimal User Story look like? How can the requirements of users be formulated as precisely as possible? Mike Cohn explains to the reader efficient techniques for creating valuable User Stories and how these are used in agile software development for planning, management, and testing.