DIACAP applies to the acquisition, operation, and sustainment of any DoD system that collects, stores, transmits, or processes unclassified or classified information since December 1997. What phases…

While 'Accreditation' is the final decision and a key outcome, the specific 'Make Accreditation Decision' is the name of the fourth phase, not simply 'Accreditation' as a standalone phase name.

'Identification' is a general activity within the DIACAP process but not one of its five formally named phases.

'System Definition' is a DIACAP phase where the system's mission, criticality, and environment are established, typically within the 'Initiate and Register System' phase.

'Verification' aligns with the 'Implement and Validate IA Controls' phase of DIACAP, where the effectiveness of security controls is assessed.

'Validation' corresponds to the 'Make Certification Determination' phase, where a formal assessment of system compliance is made.

'Re-Accreditation' aligns with the 'Maintain Authorization to Operate' phase, focusing on ongoing monitoring and periodic re-evaluation to ensure continued system authorization.