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The uncertainty inherent in applying audit procedures is referred to as audit risk. Audit risk consists of (a) the risk (consisting of inherent risk and control risk) that the balance or class and related assertions contain misstatements that could be material to the financial statements when aggregated with misstatements in other balances or classes and (b) the risk (detection risk) that the auditor will not detect such misstatement. The risk of these adverse events occurring jointly can be viewed as a function of the respective individual risks. Using professional judgment, the auditor evaluates numerous factors to assess inherent risk and control risk (assessing control risk at less than the maximum level involves performing tests of controls), and performs substantive tests (analytical procedures and test of details of account balances or classes of transactions) to restrict detection risk.