Industrial Cybersecurity & OT Risk calculator

OT Cyber Downtime Probability Calculator

Use this calculator to estimate probability weighted downtime exposure for OT cyber risk planning. It helps compare expected exposure across sites, lines, or mitigation options without describing threat techniques.

What this calculator does

  • Estimate probability weighted OT cyber downtime exposure using downtime scenarios, cost per scenario, likelihood, and fixed readiness costs.
  • Use it when converting downtime scenarios into annualized risk exposure for leadership or investment reviews.
  • The result estimates probability weighted downtime exposure for planning.

Formula used

  • Probability weighted OT cyber downtime exposure = OT cyber downtime scenario units × cost per downtime scenario unit × expected likelihood or occurrence share
  • Total OT cyber downtime probability cost = probability weighted exposure + fixed readiness and risk review cost

Inputs explained

  • OT cyber downtime scenario units: Use downtime hours, line outage scenarios, affected sites, or recovery packages for the risk scenario.
  • Cost per downtime scenario unit: Use cost per downtime hour, per line event, per site impact, or per recovery package.
  • Expected likelihood or occurrence share: Enter the probability weighted share used by the risk model or scenario review.
  • Fixed readiness and risk review cost: Include annual readiness exercises, assessments, reporting, insurance support, and resilience planning cost.

How to use the result

  • Use it to compare risk scenarios and prioritize mitigation funding.
  • Likelihood values are uncertain and should be reviewed with risk owners and current control evidence.

Common questions

  • What is the OT cyber downtime probability calculator for? It estimates probability weighted cost for an OT cyber downtime scenario.
  • What information should I enter? Use scenario units, cost per unit, likelihood percentage, and fixed readiness cost.
  • What does the result tell me? The result helps express annualized exposure for risk and investment discussions.
  • When is the result only an estimate? It is only an estimate when likelihood, outage scope, production loss, or mitigation assumptions change.

Last reviewed 2026-05-12.