"The Cyber Security Evaluation Tool (CSET) provides a systematic, disciplined, and repeatable approach for evaluating an organization's security posture. It is a desktop software tool that guides asset owners and operators through a step-by-step process to evaluate their industrial control system (ICS) and information technology (IT) network security practices. Users can evaluate their own cybersecurity stance using many recognized government and industry standards and recommendations. The Department of Homeland Security's (DHS) Industrial Control Systems Cyber Emergency Response Team (ICS-CERT) developed the CSET application, and offers it at no cost to end users."
Industrial Control Systems Cyber Emergency Response Team (ICS-CERT): https://ics-cert.us-cert.gov/