Auditing is an independent appraisal function to examine and evaluate the activities of an organisation and its results. The most common audits are: financial audit, operational audit, ICT audit, compliance audit and management audit. Three levels of auditing control activity can be distinguished:
Internal control, which is carried out by management.
Internal auditing by an independent unit of the organisation. In addition to compliance/regulation activities it may also have a role in controlling the effectiveness of the organisations internal management.
External auditing, performed by an independent body from outside the organisation.