Mental health treatment teams are living systems at the group level an
d comprise key productive subsystems of organizations providing mental
health care. Effective treatment teams, like effective organizations,
are anticipatory systems that contain subsystems that model and predi
ct future system and environmental conditions and enable responses tha
t increase system viability. A systems analysis of treatment teams hig
hlights their potential instability due to their tendencies to regress
toward dysfunctional partial systems and their active maintenance in
nonequilibrium steady states with their organizational and external en
vironments. Team subsystems are analyzed from the viewpoints of system
processes and also with regard to individuals and their roles. Bounda
ry processes are central to effective team functioning, assure constan
cy of team membership, and regulate the team's interfaces with its par
ent agency and with the external environment. Various causes and forms
of disturbed information processing within hierarchical organizations
are examined, and their effects at the treatment team level are discu
ssed. The conclusion of the discussion focuses on team leadership and
how leadership expands upon the concept of the decider subsystem to in
clude role and personal factors of the team's leaders, and functions t
hat are anticipatory and integrative in nature. Effective leaders must
set appropriate thresholds for feedback regulation processes, and bal
ance several pairs of seemingly opposing forces, including homeostasis
and development, role differentiation and role overlap, and personal
accountability and empowerment of others.