For General Information
Scrum is an iterative and incremental Agile software development framework for managing software projects and product or application development. It defines 'a flexible, holistic product development strategy where a development team works as a unit to reach a common goal.' It challenges assumptions of the 'traditional, sequential approach' to product development. Scrum enables teams to self-organize by encouraging physical co-location of all team members and daily face to face communication among all team members and disciplines in the project.
A key principle of Scrum is its recognition that during a project the customers can change their minds about what they want and need (often called requirements churn), and that unpredicted challenges cannot be easily addressed in a traditional predictive or planned manner. As such, Scrum adopts an empirical approach—accepting that the problem cannot be fully understood or defined, focusing instead on maximizing the team's ability to deliver quickly and respond to emerging requirements.Scrum Master
Scrum is facilitated by a Scrum Master, who is accountable for removing impediments to the ability of the team to deliver the product goals and deliverables. The Scrum Master is not a traditional team lead or project manager, but acts as a buffer between the team and any distracting influences. The Scrum Master ensures that the Scrum process is used as intended. The Scrum Master is the enforcer of the rules of Scrum, often chairs key meetings, and challenges the team to improve. The role has also been referred to as a servant-leader to reinforce these dual perspectives.
The Scrum Master differs from a project manager in that the latter may have people management responsibilities unrelated to the role of Scrum Master. The Scrum Master role excludes any such additional people responsibilities. In fact, there is no role of project manager in Scrum at all, because none is needed. The traditional responsibilities of a project manager have been divided up and reassigned among the three Scrum roles, and mostly to the Development Team and the Product Owner, rather than to the Scrum Master. Practicing Scrum with the addition of a project manager indicates a fundamental misunderstanding of Scrum, and typically results in conflicting responsibilities, unclear authority, and sub-optimal results.