10.13 Why do auditors want to rely on internal controls wherever possible?

10.21 An auditor is required to obtain a sufficient understanding of each of the components of an entity's system of internal control to plan the audit of the entity's financial statements and to assess control risk for the assertions embodied in the account balance, transaction class and disclosure components of the financial statements.

Required

(a) Explain the reasons an auditor may assess control risk at the maximum level for one or more assertions embodied in an account balance.

(b) What must an auditor do to support assessing control risk at less than high when the auditor has determined that controls have been placed in operation?

10.14 Identify four different types of procedures that an auditor might use when carrying out tests of control.