ISO 27004:2016 provides guidance on measuring the performance and effectiveness of an Information Security Management System (ISMS), as defined in ISO/IEC 27001.
This standard helps organizations develop meaningful metrics and indicators to evaluate whether their information security controls and processes are working as intended. It covers:
- How to define measurement objectives
- Selecting relevant metrics (e.g. number of incidents, time to respond, control effectiveness)
- Collecting, analyzing, and reporting data
- Using results for continual improvement
While ISO 27001 requires organizations to monitor and measure their ISMS, ISO 27004 shows how to do it effectively. It’s especially useful for demonstrating progress, identifying weaknesses, and justifying investments in security.
