ما هي الأدوار الثلاثة (المسؤوليات) في Scrum؟

PRODUCT OWNER  Owns the Product Backlog and maximizes product value.
               Decides WHAT gets built and in what order.

SCRUM MASTER   Serves the team, coaches Scrum, removes impediments,
               and facilitates events. Owns the team's effectiveness.

DEVELOPERS     The people who build the Increment each Sprint.
               Decide HOW the work gets done; self-managing.