FMEA-style Risk Priority Number (RPN) calculator for industrial control systems. Evaluate threat scenarios against IEC 62443-2-1 and ISO 27001 Annex A controls.
Likelihood 1–5 derived from existing controls (air-gap=1, none=5). Detectability 1–5 derived from monitoring (SIEM=1, no monitoring=5). Severity: Safety=5, Environmental=4, Production/Data=3, Reputation=2. RPN = L × D × S.
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