LLMResponse PS.L2-3.9.1.a

1. Ranking Evidence Types for PS.L2-3.9.1

Based on the assessment objective "[a] individuals are screened prior to authorizing access to organizational systems containing CUI," here's my ranking of evidence types from most to least compelling, supported by the assessment objects:

Evidence Type Ranking

1. **Documents** - Highest priority

  * Personnel security policy that defines screening requirements
  * Procedures documenting personnel screening processes
  * Records of screened personnel showing completion before access granted
  * System security plan sections addressing screening requirements

2. **Artifacts** - Second priority

  * Access control records showing that system access was granted only after screening
  * HR workflow evidence showing screening verification steps
  * Authorization forms with screening verification checkpoints

3. **Screen Share** - Third priority

  * Demonstration of the access control system showing how screening status affects permissions
  * Walkthrough of HR/security systems showing screening verification before access approval

4. **Physical Review** - Fourth priority

  * On-site observation of screening records and their connection to access control
  * Physical inspection of security controls that enforce the screening requirement

Assessment Approach Prioritization

For this assessment objective, I recommend prioritizing the assessment approaches as follows:

1. **Examine** - Highest priority

  * This approach provides direct evidence of your screening policies, procedures, and records
  * Documents show the design and implementation of your screening controls
  * Records demonstrate that screening consistently occurs before access is granted

2. **Interview** - Second priority

  * Interviews with personnel security and HR staff explain how screening policies are implemented
  * IT staff can explain how screening status affects system access permission controls
  * Interviews validate that documented procedures are understood and followed

3. **Test** - Third priority

  * Testing demonstrates the effectiveness of controls that prevent access before screening
  * While valuable, testing supplements rather than replaces examination of records and interviews

The "examine" approach should be your primary focus because the assessment objective is fundamentally about verifying a sequence of events (screening before authorization), which is best demonstrated through documentation and records. Interviews provide context and confirmation, while testing helps prove that controls operate as intended.