Industrial Cybersecurity & OT Risk worked example

OT Downtime Cyber Loss at 43% share of ot production scope affected: a worked example

This worked example runs the ot downtime cyber loss numbers for a tougher week than the baseline: 43% share of ot production scope affected instead of the typical 60%. Estimate financial loss from an OT cyber downtime scenario using downtime hours, cost per hour, affected scope, and fixed recovery costs.

The inputs for this scenario

  • OT downtime hours from the cyber event: 16 hr (held at the documented default)
  • Production margin lost per hour of OT downtime: 18,500 $ / hr (held at the documented default)
  • Share of OT production scope affected: 43 % (the input this scenario stresses; the baseline uses 60)
  • Fixed cyber recovery and incident response cost: 35,000 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Variable OT downtime cyber loss = OT downtime hours × production loss per downtime hour × affected OT production scope.
  • Total OT downtime cyber loss works out to 162,280 $ at these inputs, and this is the headline figure for the scenario.
  • Production loss per downtime hour works out to 10,143 $ / hr at these inputs.
  • Variable OT downtime cyber loss works out to 127,280 $ at these inputs.
  • Fixed cyber recovery and response cost works out to 35,000 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where share of ot production scope affected sits at 60% and the headline result is 212,600 $, this scenario comes in 23.67% below the baseline at 162,280 $.
  • Use it when scoping a ransomware or OT compromise scenario, justifying segmentation/backup spend, or sizing cyber insurance limits and retentions. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Total OT downtime cyber loss: 162,280 $ (headline result)
  • Production loss per downtime hour: 10,143 $ / hr
  • Variable OT downtime cyber loss: 127,280 $
  • Fixed cyber recovery and response cost: 35,000 $

Run it with your numbers

  • To rerun this with your own numbers, open the live OT Downtime Cyber Loss calculator, set share of ot production scope affected to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.