'Richter Scale' Model Measures Magnitude of OT Cyber Incidents

**Executive Summary:** The article introduces the OTI Impact Score, a proposed standardized metric that multiplies independently scored severity, reach, and duration values (divided by 100) to quantify the business impact of OT cybersecurity incidents; it describes methodology, examples (Colonial Pipeline and Muleshoe), the volunteer scoring portal aimed to produce results within 12 hours, and notes adoption and measurement challenges for industry and regulators.