What is Contingency Planning?
Contingency Planning is the process by which an organisation prepares plans for unexpected events or disruptions in advance, so that the continuity of critical processes is maintained. In OT environments this is vital for safeguarding safety, production and availability during outages or incidents.
Contingency planning is part of broader continuity strategies such as Business Continuity and Disaster Recovery.
🧠 How does Contingency Planning work?
- Identify critical processes and systems
- Determine possible scenarios
- Cyber attack, power outage, hardware failure, human error
- Define recovery procedures
- Backup recovery, failover mechanisms, temporary procedures
- Test and train the plans regularly
- Tabletop exercises, drills, reviews based on lessons learned
- Document and maintain
- Version control, scenario owners, links to Risk Management
A good plan describes not only what must be done, but also who, with what, and how quickly.
🏭 Contingency Planning in industrial networks
- Keep offline backups of PLC programming available
- Switch to redundancy systems on SCADA outage
- Fall back to manual operation during HMI or IO faults
- Local procedures when central monitoring or Historian are unavailable
- Clear instructions for maintenance staff during network problems
In OT, contingency planning is often about physical processes that must continue, even without IT support.
🔍 Contingency Planning vs. Disaster Recovery
| Aspect | Contingency Planning | Disaster Recovery |
|---|---|---|
| Purpose | Preparation for disruption | Recovery from a disaster or major incident |
| Focus | Broader: includes temporary measures | Focused on system and data recovery |
| Application | Operational procedures, emergency processes | IT recovery, servers, data centre, communication |
| OT example | HMI outage → manual operation with checklist | SCADA recovery from a backup server |
🔐 Security considerations
- Reduces the impact of cyber incidents, power outages and sabotage
- Part of compliance with NIST SP 800-53, ISO 27001, IEC 62443 and FISMA
- Supports Incident Response processes and Risk Management
- Defines roles during crisis situations
- Often references Immutable Backup, Jump Server and offline procedures
Without contingency planning, a relatively small incident can lead to prolonged downtime or hazardous situations.
📌 In summary
Contingency Planning is essential for the continuity of industrial processes during outages or attacks. It provides predefined, tested and documented actions to maintain control and safety.