olemus
vastavusauditile järgnev regulaarne välisaudit vastavuse jätkumise kontrolliks
= a periodic audit performed by an external auditor to ensure that an organization still meets compliance requirements

näiteid
https://reciprocity.com/resources/what-is-an-iso-surveillance-audit/

https://advisera.com/9001academy/blog/2016/10/18/what-is-an-iso-9001-surveillance-audit/