First, data on resident and staff assaults and injuries can be collected and analyzed to monitor facility safety measures and also the use of resident isolation and restraints, which affect the quality of life for those who live and work in juvenile facilities. Second, data on juvenile participation in and completion of services and treatment, along with measures of behavioral change, assist juvenile administrators in determining whether services are being delivered to and are benefiting residents. Third, data from surveys administered to youth and their families can determine whether they view correctional experiences as constructive and fair. Fourth, data that measure the implementation and effects of new policies and practices are essential in determining whether reforms are functioning and achieving the improvements intended. Fifth, data must not only measure the implementation and effects of policies and practices, but also the cost of every aspect of maintaining facility operations and programming. Such data are needed to ensure that the desired goals of a facility can be achieved and sustained with the available resources.