What is an ISMS?
What is an ISMS?
An ISMS (Information Security Management System) is a systematic framework of policies, processes, and controls that an organization uses to manage information security risks. It is the core requirement of ISO 27001 certification.
Purpose
An ISMS provides a structured approach to:
- Identifying information security risks and opportunities
- Implementing controls proportionate to those risks
- Monitoring and measuring security performance
- Continually improving the security posture
Key components
An effective ISMS typically includes:
- Information security policy — top-level commitment from leadership
- Risk assessment methodology — how the organization identifies, analyzes, and evaluates risks
- Risk treatment plan — how identified risks are addressed (mitigate, accept, transfer, avoid)
- Statement of Applicability — which controls from Annex A apply and why
- Internal audit program — regular reviews of ISMS effectiveness
- Management review — leadership evaluation of ISMS performance and direction
ISMS lifecycle
The ISMS follows a Plan-Do-Check-Act (PDCA) cycle:
- Plan — establish objectives, policies, and processes for managing risk
- Do — implement and operate the ISMS
- Check — monitor, measure, and review against objectives
- Act — take corrective actions and improve
ISMS vs individual controls
An ISMS is not a list of controls — it is the management system that governs how controls are selected, implemented, monitored, and improved. Individual controls (like access management or encryption) operate within the ISMS framework.
How episki supports your ISMS
episki provides the workspace for building and operating an ISMS: control libraries, risk registers, evidence tracking, ownership assignment, and review cadences. Learn more on our ISO 27001 page.
