Scrum rules->Product owner- represents stakeholders interest, articulate product vision, final answerer to questions, prioritises backlog and accepts whether to ship or continue testing ->Scrum master-Facilitates scrum process, coaches the team. creates environment so team is self organised and shields team from external forces, helps resolve any blocks, enforce sprint meeting and time, look towards goals, and has no authority over the team like a friend ->Scrum team ->Cross functional team->developers, testers, reco to be co located, negotiate the time