CISM Domains Explained

Domain	Focus	Approx. weight
1. Information Security Governance	Strategy, aligning security with business objectives, executive reporting	~17%
2. Information Security Risk Management	Program-level risk identification, assessment, and treatment	~20%
3. Information Security Program Development and Management	Building and running the security program itself	~33%
4. Information Security Incident Management	Program-level incident management design and readiness	~30%

Note the weighting skews heavily toward Domains 3 and 4 combined (roughly 63%) -- CISM is much more concentrated than CISSP's relatively even eight-domain spread. Candidates who under-invest in program management and incident management content will feel it on exam day.

Why the domains read differently from CISSP

Where CISSP Domain 7 (Security Operations) tests hands-on incident response phases, CISM Domain 4 tests whether you can design and govern the incident management capability itself -- policies, roles, communication plans, and executive reporting -- rather than the technical response mechanics.