ISO/IEC 27035 ISO/IEC 27035 vs ISO 22301

ISO/IEC 27035 structures information security incident management from preparation and detection through response and lessons learned.

ISO 22301:2019 specifies BCMS requirements for scope, leadership, business impact analysis, disruption risk assessment, continuity strategies and solutions, response procedures, exercises, evaluation, audit, management review, and improvement.

A cyber incident may invoke both. ISO/IEC 27035 guides handling the security incident; the BCMS decides how prioritized activities continue or recover at the required capacity and within approved time frames.

ISO/IEC 27035 uses management, an incident coordinator, an Incident Management Team, Incident Response Teams, points of contact, monitoring teams, business roles, and external responders according to the organization's design.

ISO 22301 requires top-management leadership and assigned BCMS responsibilities. Response structures need personnel and alternates with authority and competence, while activity, plan, communication, audit, and management-review owners support the system.

Name who declares the security incident, who activates continuity arrangements, who can authorize disruptive containment, and who accepts temporary service capacity. These decisions may belong to different roles.

Preparation is continuous. A reported event is assessed under organization-defined criteria and is either closed or declared and prioritized as an information security incident.

The BCMS is maintained before disruption. During an incident, organization-defined warning, escalation, and activation procedures trigger continuity solutions when products, services, or prioritized activities are at risk of unacceptable disruption.

Map incident declaration, crisis escalation, continuity-plan activation, and return-to-normal as separate states with named authorities and evidence.

The series guides an incident-management policy, plan, classification and escalation arrangements, response capability, communications, documentation, operational handling, and learning.

ISO 22301 requires context and scope, leadership, objectives, resources, competence, communications, controlled information, business impact analysis, disruption risk assessment, continuity solutions, response procedures, exercises, evaluation, audit, management review, and improvement.

Cross-reference incident and continuity plans, but keep the incident coordinator's assessment and response authority distinct from continuity activation, service-priority, and temporary-capacity decisions.

ISO/IEC 27035 evidence should show the process operating: owners, decisions, registers, control records, test results, review minutes, audit samples, or corrective actions.

ISO 22301 evidence includes BCMS scope and exclusions, legal and interested-party requirements, policy and objectives, business impact analysis, disruption risk assessment, continuity solutions and plans, activation and recovery records, exercises, evaluations, audits, management reviews, and corrective actions.

Use one incident identifier across both evidence sets, then label each decision, authority, objective, timestamp, exception, and corrective action by the process it supports.

ISO/IEC 27035 timing follows implementation, exercise, review, supplier, incident, or change cycles rather than a single universal deadline.

The business impact analysis identifies when disruption impacts become unacceptable and sets prioritized time frames for resuming activities at a specified minimum acceptable capacity. The organization also sets exercise and evaluation schedules.

Connect incident escalation to continuity activation criteria, capacity targets, and recovery priorities. Neither standard supplies a universal statutory notification clock; applicable law and contracts can.

ISO/IEC 27035 adoption can be evaluated through exercises, internal audits, customer assurance, management review, and governance review; the guidance itself is not a standalone certification scheme.

ISO 22301 contains requirements for conformity assessment. An organization may self-declare, seek interested-party or external confirmation, or seek third-party certification of its BCMS; certification does not prove every incident decision or legal duty was satisfied.

Keep ISO/IEC 27035 adoption evidence distinct from ISO 22301 conformity and certification evidence, even where the same exercise or incident record supports both.

ISO/IEC 27035 can supply the incident chronology, affected assets and services, assessment, response actions, communications, recovery status, and lessons.

The BCMS can reuse those facts while adding continuity requirements, activity and dependency impacts, activation decisions, workarounds, capacity, recovery time, and return from temporary measures.

Share facts but preserve separate decisions. Technical containment, service continuity, investigation, and return-to-normal can require different authorities and acceptance criteria.

Use ISO/IEC 27035 when the decision concerns recognizing, assessing, coordinating, containing, eradicating, recovering from, documenting, or learning from an information security incident.

Use ISO 22301 when the decision concerns continuity priorities, acceptable disruption, continuity solutions, plan activation, recovery of prioritized activities, or BCMS conformity.

If both apply, record two linked decisions: how the security incident is handled and whether continuity or crisis arrangements are activated.