| Scope boundary | BCMS scope should identify the organization, products and services, activities, sites, dependencies, outsourced processes, exclusions, and continuity responsibilities. | ISMS scope should identify the information, systems, processes, locations, organizational units, interfaces, and information security responsibilities covered by the ISMS. | A shared department, cloud service, or supplier may sit in both scopes, but the scope statement and certificate claim need to say what each management system actually covers. |
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| Covered actors | Establish, operate, monitor, review, and improve a BCMS that prepares the organization to continue and recover products and services during disruption. | Establish, operate, monitor, review, and improve an ISMS that protects information through risk assessment, risk treatment, and controls. | Choose ISO 22301 when the question is continuity capability. Choose ISO/IEC 27001 when the question is information security risk and control assurance. |
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| Trigger | ISO 22301 centers continuity analysis on BIA and risk assessment, then uses those outputs to select continuity strategies and solutions. | ISO/IEC 27001 centers security analysis on information security risk assessment and risk treatment, then uses Annex A and other controls to avoid omitted necessary controls. | Do not substitute an RTO table for an information security risk treatment plan, and do not substitute an Annex A control list for BIA and recovery strategy evidence. |
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| Core obligations | ISO 22301 uses disruption response, warning and communication, continuity procedures, recovery arrangements, exercises, and post-incident evaluation to prove readiness. | ISO/IEC 27001 treats security incidents through ISMS controls, risk treatment, monitoring, corrective action, and control improvement. | Run joint incident reviews for cyber-disruption scenarios, but record both continuity lessons and information security treatment changes. |
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| Evidence that matters | BCMS evidence includes BIA results, continuity objectives, MTPD/RTO/RPO assumptions, dependency maps, selected strategies, plans and procedures, exercise reports, post-incident reviews, audits, management reviews, and corrective actions. | ISMS evidence includes risk criteria, risk assessment results, risk treatment decisions, selected controls, Statement of Applicability, risk-owner approval, treatment-plan status, monitoring results, audits, management reviews, and corrective actions. | Reuse evidence only when the same artifact proves the specific claim for each standard; otherwise keep a link between two different records. |
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| Timing | ISO 22301 audits and management reviews should test BCMS conformity, BIA/risk assessment currency, exercise results, continuity strategy adequacy, and improvement actions. | ISO/IEC 27001 audits and management reviews should test ISMS conformity, risk assessment and treatment status, Statement of Applicability accuracy, control performance, and improvement actions. | Coordinate calendars where useful, but do not use one audit sample to close findings against the other standard unless the sample tests both criteria. |
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| Enforcement | An ISO 22301 certificate is a BCMS certificate for its stated scope. It should not be presented as proof that the organization has an ISO/IEC 27001 ISMS. | An ISO/IEC 27001 certificate is an ISMS certificate for its stated scope. It should not be presented as proof that the organization has an ISO 22301 BCMS. | Customer-facing assurance should list the certificate, scope, certificate body, date, exclusions, and supporting evidence for each standard separately. |
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| Overlap | ISO 22301 looks at whether outsourced processes and supply chain dependencies support continuity of products and services during disruption. | ISO/IEC 27001 looks at whether supplier access, cloud services, ICT supply chain dependencies, and service arrangements create information security risks that need controls. | A supplier review can serve both standards if it tests continuity capacity and information security controls separately. |
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| Practical decision rule | Use ISO 22301 as the lead standard when the deliverable is continuity of products and services, recovery strategy, exercise evidence, or BCMS certification readiness. | Use ISO/IEC 27001 as the lead standard when the deliverable is information security risk treatment, control evidence, Statement of Applicability, or ISMS certification readiness. | When both apply, keep one shared workplan but two labeled evidence columns: BCMS continuity proof and ISMS information-security proof. |
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