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Across 8 modules • Updated May 9, 2026
Author
Sorena AI
Published
May 9, 2026
Updated
May 9, 2026
ISO/IEC 27005 Asset And Scenario Modeling

How should teams model assets and scenarios under ISO/IEC 27005 risk assessments?

Start by naming the asset, the threat source, the relevant vulnerability or predisposing condition, and the expected impact. Then write the scenario as a short, testable statement that links those pieces together.

For AI governance work, start from the AI system inventory: purpose, role, provider or deployer status, data inputs, impact assessment, control owner, monitoring signal, human oversight, and change trigger. This keeps the answer useful in audits, customer reviews, incidents, supplier reviews, and management review.

  • Name the accountable owner and reviewer for Asset And Scenario Modeling.
  • Record the scope, assumptions, decision, approval date, evidence location, exception status, and next review trigger.
  • Escalate when Asset And Scenario Modeling changes risk acceptance, service commitments, customer promises, regulatory duties, or certification evidence.
Citations
ISO/IEC 27005 Asset And Scenario Modeling

What evidence should prove Asset And Scenario Modeling is current under ISO/IEC 27005?

The evidence should show the process operating. For this artifact, the strongest record usually includes risk criteria, scenarios, likelihood and impact rationale, treatment decisions, residual-risk approvals, and review records.

Avoid evidence that only repeats a requirement. A reviewer should be able to see the actual owner, date, system, supplier, AI system, service, incident, risk, or control sample behind the answer.

  • Use source records from the system of work, not screenshots created only for audit day.
  • Keep exceptions visible as risk acceptance, corrective action, or management-review input.
  • Update linked registers when the answer changes an owner, risk, control, service, supplier, or review date.
Citations
ISO/IEC 27005 Asset And Scenario Modeling

Who should approve Asset And Scenario Modeling decisions under ISO/IEC 27005?

The person who can fund, operate, and correct the process should own the decision; governance should review consistency and exceptions.

For high-impact changes, approval should include the teams affected by the evidence: security, privacy, resilience, supplier management, AI governance, legal, risk, or business service owners as relevant.

  • Use a named owner, named backup, and named escalation forum.
  • Separate preparation work from risk acceptance and final approval.
  • Keep approval records with the evidence rather than in disconnected email threads.
Citations
ISO/IEC 27005 Asset And Scenario Modeling

When should Asset And Scenario Modeling be reviewed under ISO/IEC 27005?

Review it at planned intervals and whenever the underlying scope, service, supplier, control, risk, AI system, personal data flow, incident process, or customer commitment changes.

A stale record is worse than a short record. If the facts change, update the evidence and mark what changed so the next reviewer can trust the page.

  • Set a planned review date and a change-trigger rule.
  • Use findings to update controls, procedures, contracts, risk registers, or training.
  • Carry unresolved items into management review or risk acceptance.
Citations
ISO/IEC 27005 Impact

How should teams handle Impact under ISO/IEC 27005?

Start with one decision record: scope, required inputs, owner, evidence location, and review condition. Then route the result to treatment or acceptance gates.

For ISO/IEC 27005 work, start from the information security risk scenario: affected asset, threat source, vulnerability, existing controls, business consequence, impact rationale, risk owner, treatment decision, monitoring signal, and change trigger. This keeps the answer useful in audits, customer reviews, incidents, supplier reviews, and management review.

  • Name the accountable owner and reviewer for Impact.
  • Record the scope, assumptions, decision, approval date, evidence location, exception status, and next review trigger.
  • Escalate when Impact changes risk acceptance, service commitments, customer promises, regulatory duties, or certification evidence.
Citations
ISO/IEC 27005 Impact

What evidence should prove Impact is current under ISO/IEC 27005?

The evidence should show the process operating. For this artifact, the strongest record usually includes risk criteria, scenarios, likelihood and Impact rationale, treatment decisions, residual-risk approvals, and review records.

Avoid evidence that only repeats a requirement. A reviewer should be able to see the actual owner, date, system, supplier, AI system, service, incident, risk, or control sample behind the answer.

  • Use source records from the system of work, not screenshots created only for audit day.
  • Keep exceptions visible as risk acceptance, corrective action, or management-review input.
  • Update linked registers when the answer changes an owner, risk, control, service, supplier, or review date.
Citations
ISO/IEC 27005 Impact

Who should approve Impact decisions under ISO/IEC 27005?

The person who can fund, operate, and correct the process should own the decision; governance should review consistency and exceptions.

For high-Impact changes, approval should include the teams affected by the evidence: security, privacy, resilience, supplier management, AI governance, legal, risk, or business service owners as relevant.

  • Use a named owner, named backup, and named escalation forum.
  • Separate preparation work from risk acceptance and final approval.
  • Keep approval records with the evidence rather than in disconnected email threads.
Citations
ISO/IEC 27005 Impact

When should Impact be reviewed under ISO/IEC 27005?

Review it at planned intervals and whenever the underlying scope, service, supplier, control, risk, AI system, personal data flow, incident process, or customer commitment changes.

A stale record is worse than a short record. If the facts change, update the evidence and mark what changed so the next reviewer can trust the page.

  • Set a planned review date and a change-trigger rule.
  • Use findings to update controls, procedures, contracts, risk registers, or training.
  • Carry unresolved items into management review or risk acceptance.
Citations
ISO/IEC 27005 Inherent vs Residual Risk

How should teams distinguish inherent risk from residual risk under ISO/IEC 27005?

Start with one decision record: scope, required inputs, owner, evidence location, and review condition. Then route the result to treatment or acceptance gates.

For ISMS work, keep the traceability chain visible: scope, risk, treatment choice, SoA entry, control owner, evidence sample, exception, corrective action, and management review decision. This keeps the answer useful in audits, customer reviews, incidents, supplier reviews, and management review.

  • Name the accountable owner and reviewer for Inherent vs Residual Risk.
  • Record the scope, assumptions, decision, approval date, evidence location, exception status, and next review trigger.
  • Escalate when Inherent vs Residual Risk changes risk acceptance, service commitments, customer promises, regulatory duties, or certification evidence.
Citations
ISO/IEC 27005 Inherent vs Residual Risk

What evidence should prove Inherent vs Residual Risk is current under ISO/IEC 27005?

The evidence should show the process operating. For this artifact, the strongest record usually includes risk criteria, scenarios, likelihood and impact rationale, treatment decisions, residual-risk approvals, and review records.

Avoid evidence that only repeats a requirement. A reviewer should be able to see the actual owner, date, system, supplier, AI system, service, incident, risk, or control sample behind the answer.

  • Use source records from the system of work, not screenshots created only for audit day.
  • Keep exceptions visible as risk acceptance, corrective action, or management-review input.
  • Update linked registers when the answer changes an owner, risk, control, service, supplier, or review date.
Citations
ISO/IEC 27005 Inherent vs Residual Risk

Who should approve Inherent vs Residual Risk decisions under ISO/IEC 27005?

The person who can fund, operate, and correct the process should own the decision; governance should review consistency and exceptions.

For high-impact changes, approval should include the teams affected by the evidence: security, privacy, resilience, supplier management, AI governance, legal, risk, or business service owners as relevant.

  • Use a named owner, named backup, and named escalation forum.
  • Separate preparation work from risk acceptance and final approval.
  • Keep approval records with the evidence rather than in disconnected email threads.
Citations
ISO/IEC 27005 Inherent vs Residual Risk

When should Inherent vs Residual Risk be reviewed under ISO/IEC 27005?

Review it at planned intervals and whenever the underlying scope, service, supplier, control, risk, AI system, personal data flow, incident process, or customer commitment changes.

A stale record is worse than a short record. If the facts change, update the evidence and mark what changed so the next reviewer can trust the page.

  • Set a planned review date and a change-trigger rule.
  • Use findings to update controls, procedures, contracts, risk registers, or training.
  • Carry unresolved items into management review or risk acceptance.
Citations
ISO/IEC 27005 Likelihood

How should teams handle Likelihood under ISO/IEC 27005?

Start with one decision record: scope, required inputs, owner, evidence location, and review condition. Then route the result to treatment or acceptance gates.

For risk work, separate the model from the result: risk criteria, scenario assumptions, Likelihood rationale, impact rationale, existing controls, treatment choice, residual risk, and acceptance authority. This keeps the answer useful in audits, customer reviews, incidents, supplier reviews, and management review.

  • Name the accountable owner and reviewer for Likelihood.
  • Record the scope, assumptions, decision, approval date, evidence location, exception status, and next review trigger.
  • Escalate when Likelihood changes risk acceptance, service commitments, customer promises, regulatory duties, or certification evidence.
Citations
ISO/IEC 27005:2022 standard page

Primary ISO listing for ISO/IEC 27005, cited because likelihood must be defined inside a structured information-security risk management process that supports an ISO/IEC 27001 ISMS.

ISO/IEC 27005 Likelihood

What evidence should prove Likelihood is current under ISO/IEC 27005?

The evidence should show the process operating. For this artifact, the strongest record usually includes risk criteria, scenarios, Likelihood and impact rationale, treatment decisions, residual-risk approvals, and review records.

Avoid evidence that only repeats a requirement. A reviewer should be able to see the actual owner, date, system, supplier, AI system, service, incident, risk, or control sample behind the answer.

  • Use source records from the system of work, not screenshots created only for audit day.
  • Keep exceptions visible as risk acceptance, corrective action, or management-review input.
  • Update linked registers when the answer changes an owner, risk, control, service, supplier, or review date.
Citations
ISO/IEC 27005 Likelihood

Who should approve Likelihood decisions under ISO/IEC 27005?

The person who can fund, operate, and correct the process should own the decision; governance should review consistency and exceptions.

For high-impact changes, approval should include the teams affected by the evidence: security, privacy, resilience, supplier management, AI governance, legal, risk, or business service owners as relevant.

  • Use a named owner, named backup, and named escalation forum.
  • Separate preparation work from risk acceptance and final approval.
  • Keep approval records with the evidence rather than in disconnected email threads.
Citations
ISO/IEC 27005 Likelihood

When should Likelihood be reviewed under ISO/IEC 27005?

Review it at planned intervals and whenever the underlying scope, service, supplier, control, risk, AI system, personal data flow, incident process, or customer commitment changes.

A stale record is worse than a short record. If the facts change, update the evidence and mark what changed so the next reviewer can trust the page.

  • Set a planned review date and a change-trigger rule.
  • Use findings to update controls, procedures, contracts, risk registers, or training.
  • Carry unresolved items into management review or risk acceptance.
Citations
ISO/IEC 27005 Review Cadence

How should teams handle Review Cadence under ISO/IEC 27005?

Start with one decision record: scope, required inputs, owner, evidence location, and review condition. Then route the result to treatment or acceptance gates.

For ISO/IEC 27005, the useful record is practical: decision, scope, owner, evidence, exception, review trigger, and next action. This keeps the answer useful in audits, customer reviews, incidents, supplier reviews, and management review.

  • Name the accountable owner and reviewer for Review Cadence.
  • Record the scope, assumptions, decision, approval date, evidence location, exception status, and next review trigger.
  • Escalate when Review Cadence changes risk acceptance, service commitments, customer promises, regulatory duties, or certification evidence.
Citations
ISO/IEC 27005 Review Cadence

What evidence should prove Review Cadence is current under ISO/IEC 27005?

The evidence should show the process operating. For this artifact, the strongest record usually includes risk criteria, scenarios, likelihood and impact rationale, treatment decisions, residual-risk approvals, and review records.

Avoid evidence that only repeats a requirement. A reviewer should be able to see the actual owner, date, system, supplier, AI system, service, incident, risk, or control sample behind the answer.

  • Use source records from the system of work, not screenshots created only for audit day.
  • Keep exceptions visible as risk acceptance, corrective action, or management-review input.
  • Update linked registers when the answer changes an owner, risk, control, service, supplier, or review date.
Citations
ISO/IEC 27005 Review Cadence

Who should approve Review Cadence decisions under ISO/IEC 27005?

The person who can fund, operate, and correct the process should own the decision; governance should review consistency and exceptions.

For high-impact changes, approval should include the teams affected by the evidence: security, privacy, resilience, supplier management, AI governance, legal, risk, or business service owners as relevant.

  • Use a named owner, named backup, and named escalation forum.
  • Separate preparation work from risk acceptance and final approval.
  • Keep approval records with the evidence rather than in disconnected email threads.
Citations
ISO/IEC 27005 Review Cadence

When should Review Cadence be reviewed under ISO/IEC 27005?

Review it on a planned schedule and on an ongoing basis, and update it whenever the underlying scope, service, supplier, control, risk, AI system, personal data flow, incident process, or customer commitment changes. NIST risk guidance says the useful life of assessment results is bounded in time, that organizations should determine how long results remain relevant, and that updates should be triggered by significant changes and incidents.

Set a planned review date and a change-trigger rule. If the facts change, update the evidence and mark what changed so the next reviewer can trust the page.

  • Set a planned review date and a change-trigger rule.
  • Use findings to update controls, procedures, contracts, risk registers, or training.
  • Carry unresolved items into management review or risk acceptance.
Citations
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