Risk and Sample Sizes The whole focus of an audit hinges on the risk of material misstatement, and the limited resources and time to detect any misstatement. Therefore, the risk of misstatement is assessed, and limited testing performed based on the risk assessed and the measure of accuracy of the results of the tests desired. ISA315 (and its revision) steers clear of explaining the practicalities of applying risk assessment to sample sizes and the audit approach. In this article, we attempt to address this gap. [...]