Industrial Cybersecurity & OT Risk calculator

OT Downtime Cyber Loss Calculator

Use this calculator to estimate the cost of lost production from an OT cyber incident. It fits scenarios involving PLCs, HMIs, SCADA nodes, industrial networks, historian outages, and recovery work that interrupts production or utility operations.

What this calculator does

  • Estimate financial loss from an OT cyber downtime scenario using downtime hours, cost per hour, affected scope, and fixed recovery costs.
  • Use it when a plant needs a defensible downtime exposure number for OT security planning, risk reviews, or resilience investment.
  • The result estimates the business impact of a cyber related OT downtime scenario.

Formula used

  • Variable OT downtime cyber loss = OT downtime hours × production loss per downtime hour × affected OT production scope
  • Total OT downtime cyber loss = variable OT downtime cyber loss + fixed cyber recovery and response cost

Inputs explained

  • OT downtime hours: Estimate the hours that production, utilities, or critical OT systems would be unavailable or constrained.
  • Production loss per downtime hour: Use margin loss, throughput loss, overtime recovery cost, idle labor, spoilage, or contractual downtime cost per hour.
  • Affected OT production scope: Use 100% for a full site outage or a lower share for one line, cell, utility system, or process area.
  • Fixed cyber recovery and response cost: Include incident coordination, control system recovery, validation, expedited parts, outside support, and restart checks.

How to use the result

  • Use it to prioritize segmentation, backups, monitoring, tabletop exercises, and recovery planning based on production exposure.
  • It is a scenario estimate and does not predict incident likelihood or replace a formal OT risk assessment.

Common questions

  • What is the OT downtime cyber loss calculator for? It estimates production and recovery cost for an OT cyber downtime scenario.
  • What information should I enter? Use downtime hours, production loss per hour, affected scope, and fixed recovery cost.
  • What does the result tell me? The result helps compare downtime exposure across lines, plants, or mitigation options.
  • When is the result only an estimate? It is only an estimate when production schedules, recovery steps, product mix, or outage scope are uncertain.

Last reviewed 2026-05-12.