The Office of Management and Budget (OMB) is the largest office within the Executive Office of the President of the United States (EOP). The Director of the OMB is a member of the executive office of the president. The main function of the OMB is to assist the President in preparing the budget. The OMB also measures the quality of agency programs, policies, and procedures and to see if they comply with the President's policies.
More at: Office of Management and Budget