3.1 Audit Risk Model & Audit Opinion Modifications
Calculate detection risk (DR = AR / [IR x CR]) and master opinion modification rules under AU-C Section 705 (Unmodified, Qualified, Adverse, Disclaimer).
Key Blueprint Takeaways
- When Risk of Material Misstatement (IR x CR) is high, acceptable Detection Risk must be low.
- Material but non-pervasive GAAP departure = Qualified opinion ('except for').
- Material and pervasive GAAP departure = Adverse opinion.
The primary purpose of an independent financial statement audit is to provide reasonable assurance that the financial statements are free of material misstatement, whether caused by error or fraud.
The auditor manages audit risk through detection risk. If management's internal controls are ineffective (high control risk) or business accounts are volatile (high inherent risk), the auditor must expand substantive audit procedures to achieve low detection risk.
During audit planning for a publicly traded commercial client, the engagement team assesses inherent risk (IR) as high due to complex derivative contracts, and control risk (CR) as high because internal controls over financial reporting have multiple material weaknesses. In accordance with AICPA AU-C Section 200, how must the auditor adjust acceptable detection risk (DR) and the nature, timing, and extent of substantive testing?