This website answers the questions: Who is the Auditor-General? Why have an Auditor-General? What does the Auditor-General do? How does the office support the Auditor-General? What outputs does the Auditor-General produce? What types of audits are carried out? How is an audit conducted? What happens to Auditor-General's Reports?

http://www.audit.vic.gov.au/about_us/role_of_the_auditor-general.aspx