Which statement best describes sufficiency and appropriateness of audit evidence?

• A. Sufficiency is the quantity of evidence; appropriateness is the quality, relevance, and reliability of evidence
• B. Sufficiency is the quality; appropriateness is the quantity
• C. Sufficiency and appropriateness are unrelated
• D. Appropriateness is the amount of evidence; sufficiency is its reliability

Answer: (A)

Sufficiency and appropriateness describe two aspects of audit evidence: how much you have and how good that evidence is for testing a claim. Sufficiency is the amount of evidence—the volume and extent needed to support conclusions. Appropriateness is the quality of evidence, meaning its relevance to the assertion being tested and its reliability as an indicator.

So, the best description is that sufficiency equals quantity, while appropriateness covers quality, including relevance and reliability. For example, external confirmations tend to be more reliable than internally generated documents, and testing high-risk areas typically requires more evidence to achieve a similar level of assurance. This combination ensures the auditor has enough evidence that is also suitable to the audits’ objectives.