Agile software development is a methodology that focuses on iterative and incremental development. Some synonyms for agile software development include rapid application development, flexible software development, adaptive software development, and lean software development. These terms all refer to an approach that values customer collaboration, rapid prototyping, and continuous deployment. Other terms that may be used interchangeably with agile software development include scrum, Kanban, and extreme programming (XP). Regardless of the specific terminology used, the common thread is an emphasis on responsiveness to change, efficient collaboration, and a focus on delivering value to the customer in a timely and iterative manner.