Document review

Answer:

There is no single answer for the most appropriate approach, because each organization has its own needs to perform documentation review, but the most common adopted frequency is the annual review, because this periodicity helps certified organizations to be ready for surveillance audits, which are in general performed annually, without much increase in the administrative work.

This article will provide you further explanation about document management:
- Document management in ISO 27001 & BS 25999-2 https://advisera.com/27001academy/blog/2010/03/30/document-management-within-iso-27001-bs-25999-2/

This material will also help you regarding document management:
- Managing ISO Documentation: A Plain English Guide https://advisera.com/books/managing-iso-documentation-plain-english-guide/