Well, the manager is not supposed to be there. A scrum master is supposed to keep it organized and time boxed, but the team is supposed to self police/organize themselves.
It's supposed to be like a restaurant where all the waiters share tips. It is in everyone's interest that one, all customers are being served well and two, that all waiters are pulling their weight.
It's supposed to be like a restaurant where all the waiters share tips. It is in everyone's interest that one, all customers are being served well and two, that all waiters are pulling their weight.