The Institute of Internal Auditors defines internal auditing in this way:
"Internal auditing is an independent appraisal function established within an organization to examine and evaluate its activities as a service to the organization. The objective of internal auditing is to assist members of the organization in the effective discharge of their responsibilities. To this end, internal auditing furnishes them with analysis, appraisals, recommendations, counsel, and information concerning the activities reviewed."
The Core Principles, taken as a whole, articulate internal audit effectiveness. For an internal audit function to be considered effective, all Principles should be present and operating effectively. How an internal auditor, as well as an internal audit activity, demonstrates achievement of the Core Principles may be quite different from organization to organization, but failure to achieve any of the Principles would imply that an internal audit activity was not as effective as it could be in achieving internal audit’s mission (see Mission of Internal Audit).
The Mission of Internal Audit articulates what internal audit aspires to accomplish within an organization. Its place in the New IPPF is deliberate, demonstrating how practitioners should leverage the entire framework to facilitate their ability to achieve the Mission.
To enhance and protect organizational value by providing risk-based and objective assurance, advice, and insight.
*See Mission of Internal Audit*