Recent advances in user access technology enables the delivery of Network multicast to residential users. In order for such a service to be successful, efficient management must be performed in order to cope with a large and dynamic quantity of users. In this paper we investigate a practical monitoring scheme based on statistical control of quality of for such a purpose. We address the issue of when to trigger management actions, by formulating the problem in terms of quality of control. Our work is targeting an efficient network monitoring entiy with a larger management platform.