<prompt> Translate the following text to EnglishLengo kuu la ITRB ni kutoa ukaguzi wa mipango mikubwa ya mfumo kwa ombi la pamoja la Ofisi ya Usimamizi na Bajeti na shirika na kutangaza masomo yaliyopatikana na mazoea ya kuahidi.  <response>: 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. 