What is the main purpose of documented information in an ISO 27001 context?

In the context of ISO 27001, the main purpose of documented information is to define how information should be created, updated, and controlled. This is crucial because the management of information security is a systematic approach that requires clear documentation to ensure consistency, accountability, and reliability in handling information.

Documented information serves as a backbone for establishing processes, helping to maintain the integrity of the information security management system (ISMS). It outlines procedures for various activities, such as risk assessments, corrective actions, and policy enforcement, providing a structured framework that employees can follow. This documentation ensures compliance with the organization's own policies as well as external regulatory requirements.

While providing evidence of compliance with regulations and documenting incidents are important aspects of an ISMS, they are not the primary focus when discussing the overall purpose of documented information. Similarly, summarizing the organization's information security policy is just one aspect of what documented information might include, whereas the definition and control of how information is managed encompasses a broader scope essential for the effective functioning of the ISMS.