The primary focus of ITRB is to provide a review of major system initiatives at the joint request of the Office of Management and Budget and an agency and to publicize lessons learned and promising practices.
The primary and most recent addition to the focus of ITRB is to provide a review of major system initiiatives. 
mnli hypothesis: The primary and most recent addition to the focus of ITRB is to provide a review of major system initiiatives.  premise: The primary focus of ITRB is to provide a review of major system initiatives at the joint request of the Office of Management and Budget and an agency and to publicize lessons learned and promising practices.