The ScrumMaster is a new management role introduced by Scrum. The ScrumMaster is responsible for the success of Scrum. Given that explanation, there really is no analog of the ScrumMaster in traditionally managed projects. Further, “The ScrumMaster is responsible for ensuring that Scrum values, practices and rules are enacted and enforced. The ScrumMaster is the driving force behind all of the Scrum practices.” Thus most of the ScrumMaster’s responsibilities fall entirely within the purview of Scrum itself.
The ScrumMaster facilitates communication between individual team members, between the team and the PO and the larger organization. The ScrumMaster is also responsible for advocating continuous improvement in quality and the process itself. The ScrumMaster makes the progress reporting mechanisms and metrics in Scrum visible and educates the PO (and the larger organization) in their meaning and use. In short, it is the responsibility of the ScrumMaster to create and foster the environment in which the PO and the Scrum Team can take charge of all the project management responsibilities they have in a Scrum context and discharge those responsibilities effectively and successfully.
It is important to note, however, that the ScrumMaster DOES NOT have any authority and IS NOT a manager of people or projects. The ScrumMaster doesn’t, for example, assign tasks to team members or monitor team member performance and the team doesn’t report to the ScrumMaster.