Scrum : In rugby, ‘scrum’ (related to “scrimmage”) is the term for a huddled mass of players engaged with each other to get a job done. In software development, the job is to put out a release. Scrum for software development came out of the rapid prototyping community because prototypers wanted a methodology that would support an environment in which the requirements were not only incomplete at the start, but also could change rapidly during development. Unlike XP, Scrum methodology includes both managerial and development processes.