What is an Incident Response Plan?
An Incident Response Plan (IRP) is a documented strategy and set of procedures describing how an organisation responds to Cybersecurity incidents such as data breaches, Malware, Ransomware or system intrusions.
The IRP ensures everyone knows what to do, who to call and how to act when an incident occurs — to limit damage and accelerate recovery.
🎯 Why is an Incident Response Plan important?
- Limits impact and downtime during incidents
- Speeds up decision-making and communication under pressure
- Supports compliance with NIS2, ISO 27001, BIO, AVG
- Strengthens collaboration between IT, OT, security and management
- Enables exercise, testing and improvement (IR drills)
📦 What does an Incident Response Plan contain?
| Component | Description |
|---|---|
| Purpose & scope | What types of incidents the plan covers (IT, OT, cloud, data, etc.) |
| Definitions & classifications | What is an incident? And how serious (severity levels)? |
| Incident Response Team | Who takes which role? (IRT, CSIRT) |
| Contact information | Internal and external points of contact, suppliers, regulators |
| Step-by-step plan (IR process) | In line with NIST phases: detection, containment, recovery, evaluation |
| Escalation policy | When and how management or external parties are involved |
| Communication plan | Internal updates, press communication, statutory notifications |
| Documentation & logging | How everything is recorded for evaluation and audits |
| Exercise & evaluation | Schedule of tests and review moments |
🧭 The 6 phases of Incident Response (per NIST)
- Preparation – Training, tools, team, IR plan
- Detection & identification – Recognising a possible incident
- Containment – Stopping the spread (isolating networks, blocking access)
- Eradication – Removing the root cause (deleting malware, closing backdoors)
- Recovery – Bringing systems safely back online
- Lessons learned – Analysis, reporting, improvement actions
🏭 IRP in OT environments
In production environments, the Incident Response Plan often also includes:
- Impact analysis on production, safety and the environment
- Specific recovery procedures for SCADA, PLC, HMI
- Coordination with maintenance and process safety
- Escalation to process operators, HSE or external suppliers
- Procedures for offline logging or manual operation
✅ Benefits of a good IR plan
- Fast and structured response to incidents
- Less chaos and delay during acute disruptions
- Better communication and collaboration under pressure
- Legally and audit-defensible actions (traceability)
- Continuous improvement through post-incident analysis
📌 In summary
An Incident Response Plan is an indispensable document that delivers coordination, speed and control during a Cybersecurity incident. It defines how an organisation responds, recovers and learns — crucial for resilience and Compliance.