LLMResponse AC.L2-3.1.1.a

Evidence Types and Assessment Approaches for AC.L2-3.1.1 Assessment Objective [a]

Ranking of Evidence Types for Assessment Objective [a]

For the assessment objective "[a] authorized users are identified," I recommend prioritizing evidence types in this order:

1. **Documents**: User authorization lists, access control policies, and account management procedures provide the most direct evidence that authorized users are formally identified.

2. **Artifacts**: System-generated user account lists, role assignment records, and access authorization records demonstrate implementation of user identification.

3. **Screen Share**: Observing administrators accessing and managing user authorization systems provides real-time verification of processes.

4. **Physical Review**: On-site examination of physical access controls and documentation would be supplementary evidence.

Prioritizing Assessment Approaches

For assessment objective [a], I recommend prioritizing the three assessment approaches as follows:

1. **Examine**: This should be your primary approach. Review documentation that defines and lists authorized users, including:

  - User authorization lists with assigned roles
  - Access control policy defining authorization procedures
  - Account management procedures
  - System security plan sections addressing user identification
  - User account management records

2. **Interview**: Follow up with targeted interviews to verify understanding and implementation:

  - Speak with personnel responsible for account management
  - Interview system administrators who implement access controls
  - Consult with security personnel who oversee access authorization

3. **Test**: Finally, validate through testing:

  - Observe the user account creation process
  - Verify that user identification mechanisms work as documented
  - Check that the user authorization process follows established procedures

This prioritization aligns with the CMMC Assessment Guide's approach, where examination of documentation establishes the foundation, interviews verify implementation knowledge, and testing confirms operational effectiveness of the controls that identify authorized users.