01
PCAOB inspection reports 2024–2026 have validated agent-produced evidence meeting four characteristics: authenticity, completeness, source reliability, reperformability.
Authenticity via SHA-256 cryptographic hashing; completeness via continuous full-population testing; source reliability via direct read-only system integration; reperformability via preserved reasoning traces plus source-system query parameters. Document-centric evidence lacking cryptographic integrity, black-box automated evidence, and user-submitted attestation without independent verification are common exposure patterns.
Source: PCAOB Annual Report on Broker-Dealer Inspections 2024; PCAOB Staff Inspection Brief Volume 2024-02; PCAOB 2025 Staff Inspection Outlook
02
PCAOB inspection reports 2023–2025 identify deficiencies at mid-market auditors when internal audit is understaffed relative to control population.
The 2024 annual report on broker-dealer and emerging-growth-company inspections specifically called out insufficient testing rigor on access review and change management at programs running at the thinnest 1 FTE per 60+ control ratios under manual testing. The inspection posture validates the traditional benchmark as the minimum defensible ratio.
Source: PCAOB Annual Report on Broker-Dealer Inspections 2023, 2024; PCAOB Staff Inspection Outlook 2025
03
PCAOB AS 2201 key sections for ITGC evidence: §.36, §.39, §.42, §.46, §.47, §.50.
§.36 identifies controls addressing significant risks. §.39 establishes evidence characteristics (authenticity, completeness, source reliability, reperformability). §.42 governs nature/timing/extent of tests. §.46 governs design effectiveness testing. §.47 governs operating effectiveness testing. §.50 governs deficiency evaluation (significant deficiency vs material weakness).
Source: PCAOB Auditing Standard No. 2201 (Auditing Standard No. 5); PCAOB AS 2201 current text as amended