ISO/IEC 27035 Lead Incident Manager Training — Lesson 4: Post-Incident Review, Metrics, Exercises, Lessons, and Improvement

Learning Objectives

• Interpret the principles, requirements, roles, and dependencies shaping post-incident review, metrics, exercises, lessons, and improvement.
• Apply the workflow and produce incident lessons and capability improvement report that another practitioner can review.
• Analyze “a repeated incident is closed without verifying corrective-action effectiveness” and recommend a proportionate, supported response.

Detailed Topics

• post-incident review
• root-cause analysis
• incident metrics
• exercise programme
• lessons learned
• corrective action
• control improvement
• maturity assessment
• Competence, communication, governance, documented information, risk, validation, and follow-up considerations

Instructor Demonstration

The instructor demonstrates the post-incident review, metrics, exercises, lessons, and improvement workflow, identifies the applicable inputs and responsibilities, records checkpoints in incident lessons and capability improvement report, and contrasts the accepted state with a condition where a repeated incident is closed without verifying corrective-action effectiveness.

Hands-On Exercise

Complete a controlled implementation, audit, assessment, or foundation exercise for Post-Incident Review, Metrics, Exercises, Lessons, and Improvement. Establish scope and criteria, collect or create evidence, examine “a repeated incident is closed without verifying corrective-action effectiveness,” reach a supported conclusion, and preserve the result in incident lessons and capability improvement report.

1. Confirm objectives, scope, roles, criteria, stakeholders, and expected outputs.
2. Perform the planned activities while recording assumptions, evidence, and decisions.
3. Test a normal case, an exception, and a follow-up or improvement condition.
4. Document conclusions, owners, due dates, escalation, and verification requirements.

Scenario Analysis

• Identify the requirement or principle with the strongest influence on post-incident review, metrics, exercises, lessons, and improvement.
• Compare two defensible responses and explain their governance, risk, and evidence trade-offs.
• Determine how incident lessons and capability improvement report should be approved, retained, reviewed, and updated.

Troubleshooting Guidance

Separate missing evidence from ineffective practice, and distinguish a documentation issue from a control, process, governance, or competence failure. Use incident lessons and capability improvement report to trace the earliest divergence. Treat “a repeated incident is closed without verifying corrective-action effectiveness” as a hypothesis until the response is validated against the applicable requirement and intended outcome.

Validation Checklist

• The scope, criteria, stakeholders, and intended outcome for post-incident review, metrics, exercises, lessons, and improvement are explicit.
• The incident lessons and capability improvement report links statements and decisions to objective, reviewable support.
• Responsibilities, competence, communication, risk, legal duties, and change impact were considered where relevant.
• Findings, corrective actions, monitoring, review triggers, and improvement ownership are clear.

Lesson Outcome

Learners can apply Post-Incident Review, Metrics, Exercises, Lessons, and Improvement, explain the reasoning used, and defend the result through incident lessons and capability improvement report.