ISO/IEC 27001 Risk Treatment Register Workflow

Begin with an assessed information security risk, its owner, level, and priority under the organization's documented criteria. Then capture the chosen treatment option, every necessary control, the Annex A completeness comparison, planned actions, owners, resources, target dates, and dependencies. ISO/IEC 27001 requires appropriate treatment options but does not prescribe labels such as reduce, avoid, share, or accept.

After implementation, record results and the recalculated residual risk. Close the decision only when the risk owner has approved the treatment plan and accepted the residual risk under the organization's criteria. If implementation is incomplete, the rating exceeds the acceptance criteria, or the risk owner refuses acceptance, keep the record open and revise the treatment, resources, deadline, or escalation.

Stable identifiers are a practical traceability control, not a prescribed ISO field. Use them to connect the assessment, treatment plan, SoA, implementation tickets, operating evidence, effectiveness result, and acceptance when those records live in different systems.

Preserve both planned and actual dates and both pre-treatment and residual ratings. That distinction prevents incomplete actions from appearing as completed risk reduction.

The assessor applies the approved method and identifies the risk owner. The organization chooses who proposes treatment and implements controls. Clause 6.1.3 requires the risk owner to approve the treatment plan and accept the residual risk; it does not prescribe a committee, assessor, or control-owner title.

Governance can set thresholds and escalation paths, but it should not erase accountability. A committee approval without a named risk owner does not satisfy the standard's explicit risk-owner approval and acceptance step.

Common failures are using a generic 'security' owner, recording only the target rating, treating planned controls as implemented, or closing treatment without evidence and residual-risk acceptance.

Another failure is limiting controls to Annex A. Necessary controls can be designed by the organization or identified from any source. Annex A is then used to check whether a necessary control was overlooked.

ISO/IEC 27001 requires risk assessment at planned intervals and when significant changes are proposed or occur. Reopen the register entry when that assessment changes the risk result or when scope, assets, suppliers, threats, vulnerabilities, incidents, controls, or implementation evidence invalidate the recorded decision.

Preserve the old rating and approval as history, calculate the current residual risk consistently, and route changed treatment or acceptance decisions to the accountable risk owner.