ISO/IEC 27005 Foundation Training — Lesson 3: Operating Analysis, Evaluation, Treatment, Control Selection, Residual Risk, and Acceptance

Learning Objectives

• Interpret the purpose, responsibilities, inputs, and decision points shaping operating analysis, evaluation, treatment, control selection, residual risk, and acceptance.
• Apply the workflow and produce security risk evaluation and treatment plan that another practitioner can review.
• Analyze “risk acceptance is approved by someone without delegated authority” and recommend a proportionate, evidence-based response.

Detailed Topics

• risk analysis
• risk evaluation
• treatment options
• control selection
• residual risk
• risk acceptance
• treatment ownership
• implementation priority
• Governance, competence, communication, documentation, validation, risk, and follow-up considerations

Instructor Demonstration

The instructor demonstrates the operating analysis, evaluation, treatment, control selection, residual risk, and acceptance workflow, identifies applicable responsibilities, records checkpoints in security risk evaluation and treatment plan, and contrasts the accepted state with a condition where risk acceptance is approved by someone without delegated authority.

Hands-On Exercise

Complete a controlled implementation, management, audit, assessment, foundation, introduction, or transition exercise for Operating Analysis, Evaluation, Treatment, Control Selection, Residual Risk, and Acceptance. Establish scope and criteria, collect or create evidence, examine “risk acceptance is approved by someone without delegated authority,” reach a supported conclusion, and preserve the result in security risk evaluation and treatment plan.

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 operating analysis, evaluation, treatment, control selection, residual risk, and acceptance.
• Compare two defensible responses and explain their governance, risk, and evidence trade-offs.
• Determine how the security risk evaluation and treatment plan 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 security risk evaluation and treatment plan to trace the earliest divergence. Treat “risk acceptance is approved by someone without delegated authority” 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 operating analysis, evaluation, treatment, control selection, residual risk, and acceptance are explicit.
• The security risk evaluation and treatment plan 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 Operating Analysis, Evaluation, Treatment, Control Selection, Residual Risk, and Acceptance, explain the reasoning used, and defend the result through security risk evaluation and treatment plan.