Generally, audit has a responsibility for ensuring that (1) independence and objectivity are maintained in all phases of assignments, (2) professional judgment is utilized in planning approaches, performing procedures, and reporting results of engagements, (3) work is conducted by personnel who are professionally competent and collectively have the necessary skills and knowledge, and (4) an independent peer review is periodically performed resulting in an opinion issued as to whether the audit quality control system is designed and operated to provide reasonable assurance of conforming with professional standards as well as legal mandates.
U.S. GAO. Government Auditing Standards. Rev. ed. Washington, DC: Government Printing Office, 2003. http://www.gao.gov/govaud/d07162g.pdf (accessed April 21, 2008).