Population35. It is important for the auditor to ensure that the population is:(a) Appropriate to the objective of the audit procedure, which will includeconsideration of the direction of testing. For example, if the auditor’sobjective is to test for overstatement of accounts payable, thepopulation could be defined as the accounts payable listing. On theother hand, when testing for understatement of accounts payable, thepopulation is not the accounts payable listing but rather subsequentdisbursements, unpaid invoices, suppliers’ statements, unmatchedreceiving reports or other populations that provide audit evidence ofunderstatement of accounts payable; and(b) Complete. For example, if the auditor intends to select paymentvouchers from a file, conclusions cannot be drawn about all vouchersfor the period unless the auditor is satisfied that all vouchers have infact been filed. Similarly, if the auditor intends to use the sample todraw conclusions about whether a control activity operated effectivelyduring the financial reporting period, the population needs to includeall relevant items from throughout the entire period. A differentapproach may be to stratify the population and use sampling only todraw conclusions about the control activity during, say, the first 10months of a year, and to use alternative audit procedures or a separatesample regarding the remaining two months. ISA 330 containshướng dẫn bổ sung về thực hiện các thủ tục kiểm toán tại một tạm thờikhoảng thời gian.
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