The secretary shall be generally responsible for the sound fiscal management of each department, office, or other unit within the agency. The secretary shall review and approve the proposed budget of each department, office, or other unit. The secretary shall hold the head of each department, office, or other unit responsible for management control over the administrative, fiscal, and program performance of his or her department, office, or other unit. The secretary shall review the operations and evaluate the performance at appropriate intervals of each

department, office, or other unit, and shall seek continually to improve the organizational structure, the operating policies, and the management information systems of each department, office, or other unit.