What is a common methodology used for risk assessments in IACS?

The NIST SP 800-30 risk management framework is widely recognized for its structured approach to conducting risk assessments, particularly in the context of information systems, including Industrial Automation and Control Systems (IACS). This framework provides a comprehensive method for identifying, analyzing, and evaluating risks, which is crucial for ensuring the cybersecurity of these systems.

NIST SP 800-30 emphasizes the importance of understanding the specific threats, vulnerabilities, and impacts related to the operational technology environment. The methodology includes guidance on selecting and implementing appropriate security controls based on the identified risks, making it especially relevant for IACS, where safety and operational integrity are paramount.

In contrast, while the ISO 27001 framework offers a broader approach to information security management, including risk management components, it is not as specifically tailored for the unique risks associated with IACS systems. The COBIT framework focuses primarily on governance and management of enterprise IT, rather than on risk assessment methodologies for cyber threats. The ITIL framework is centered around IT service management and does not directly address risk assessment in the context of cybersecurity for control systems. Therefore, the NIST SP 800-30 is the optimal choice for risk assessments in the context of IACS due to its specific focus and comprehensive methodology tailored to