(a) Through the department of children's services, the state of Tennessee, in cooperation with juvenile courts, local communities, schools and families will strive to provide timely, appropriate and cost-effective services for children in state custody and at risk of entering state custody so that these children can reach their full potential as productive, competent and healthy adults. The department is created to provide services to those children who are unruly, delinquent, dependent and neglected, and their respective families, as well as for children who are at imminent risk and in need of services to prevent entry into state custody, who are in state custody pending family reunification or other permanent placement, or as otherwise may be required for such children and their families pursuant to state law. In all cases, the services shall be to further the best interest of the child, and when appropriate, to preserve the relationship between the child and the family. Whenever possible, the services shall be provided in the community where the child lives and in a setting that is the least restrictive and, yet, the most beneficial to the child. For the children it serves, the department shall strive to:

(1) Protect children from abuse, mistreatment or neglect;

(2) Provide prevention, early intervention, rehabilitative and educational services;

(3) Pursue appropriate and effective behavioral and mental health treatment;

(4) Ensure that health care needs, both preventive and practical, are met; and

(5) Keep children safe.

(b) The department will work to preserve the safety and protect the standards in Tennessee communities through efforts to combat delinquency and other social ills concerning young people. The department shall work to continuously improve the management and coordination of services for the children and families of Tennessee identified in this section by ensuring thorough evaluations and assessments, appropriate and effective service delivery, timely permanency planning and supportive supervision and monitoring of the progress of children discharged from state custody.