ISO 27001 emphasises the importance of effectively managing changes to information systems and processes through a structured Change Control Policy. This policy is vital for maintaining the integrity and security of an organisation's information assets while managing changes systematically to minimise potential security risks.
What is a Change Control Policy?
A Change Control Policy is a formal set of guidelines and procedures that governs how modifications to IT systems, applications, and infrastructures are managed and implemented within an organisation. The policy ensures that all changes are controlled, including their design, implementation, and effects on existing systems and business operations.
Key Elements of a Change Control Policy
The key elements typically included in a Change Control Policy (as per the template provided in the de.iterate platform) include:
Definition of a Change
A change is any planned alteration or modification to a system or configuration that affects a running production or customer-facing environment. It excludes automated processes or routine non-impacting tasks.
Roles and Responsibilities
Change Implementer: Assumes ownership of the change, responsible for its quality, scheduling, and approval.
Change Approval: Senior roles must approve all planned production-impacting changes before implementation.
Change Assessment: Ensures that the change is peer-reviewed to validate its technical accuracy, effective testing plan, and appropriate timing without degrading resilience, business continuity, or information security.
Exceptions
Break/Fix Changes: Immediate changes implemented to resolve active issues, which still require a post-change assessment.
BAU Tasks: Regular tasks with predefined inputs and limited impact, documented and approved in advance.
Monitoring Compliance
Compliance with the Change Control Policy is mandatory, and all changes are subject to review to ensure adherence.
Document Control
Includes information on the policy owner, classification, publication date, and review schedule.
Benefits of a Change Control Policy
Implementing a robust Change Control Policy offers several benefits:
Minimises Risks: Helps identify potential security issues before they become problems.
Ensures Compliance: Maintains compliance with ISO 27001 and other relevant standards and regulations.
Improves Traceability: Enhances the traceability of changes, aiding in audits and reviews.
Supports Business Continuity: Ensures that changes do not adversely affect business operations.