ISO 19011 is an international standard that sets forth guidelines for:

- quality management systems auditing
- environmental management systems auditing

It is developed by the International Organization for Standardization.

The standard offers four resources to organizations to "save time, effort and money" :

- A clear explanation of the principles of management systems auditing.
- Guidance on the management of audit programmes.
- Guidance on the conduct of internal or external audits.
- Advice on the competence and evaluation of auditors.