What it means
OT recovery restores trustworthy control, visibility, configuration, data, and operations in a sequence that protects people, environment, equipment, and process stability.
Why it matters
Fast technical restoration can be unsafe when controller state, field conditions, interlocks, dependencies, recipes, or operator awareness are uncertain.
Practical focus
- Define safe shutdown, degraded operation, manual control, restart authority, dependency order, validation points, and stop conditions.
- Protect and test backups for logic, configuration, firmware, applications, credentials, historian data, and documentation.
- Use clean recovery environments, integrity checks, engineering and operations approval, process observation, and phased return to service.
- Preserve this evidence: Retain recovery plans, asset and dependency priorities, backups, integrity records, exercise results, approvals, deviations, and post-recovery validation.
- Exercise this failure scenario: A restored controller or HMI returns with stale logic, wrong parameters, or incomplete process context and causes a second operational event.
Common mistakes
- Using the label OT Recovery and Process Safety without defining scope, ownership, decision authority, and the exact data, systems, people, or process affected.
- Treating a policy, contract, diagram, dashboard, or tool demonstration as proof that OT Recovery and Process Safety operates consistently in production.
- Closing work without retaining the evidence needed to reconstruct the decision and verify the intended control outcome.
- Testing only the normal path and never rehearsing the failure condition: A restored controller or HMI returns with stale logic, wrong parameters, or incomplete process context and causes a second operational event.
Certification relevance
This subject appears in or supports the following certification bodies of knowledge: