NBN EN ISO 19011:2011

ISO 19011:2011 provides guidance on auditing management systems, including the principles of auditing, managing an audit programme and conducting management system audits, as well as guidance on the evaluation of competence of individuals involved in the audit process, including the person managing the audit programme, auditors and audit teams.
ISO 19011:2011 is applicable to all organizations that need to conduct internal or external audits of management systems or manage an audit programme.
The application of ISO 19011:2011 to other types of audits is possible, provided that special consideration is given to the specific competence needed.