[The following paragraph was effectivefor audits of financial statements for periods beginning on or after January 1, 1989. It was amended by PCAOB Auditing Standard No. 2, effective for audits of fiscal years ending on or after November 15, 2004, for accelerated filers, and on or after July 15, 2005, for all other issuers. See PCAOB Release No. 2004-008
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The auditor considers the level of assurance, if any, he wants from substantive testing for a particular audit objective and decides, among other things, which procedure, or combination of procedures, can provide that level of assurance. For some assertions, analytical procedures are effective in providing the appropriate level of assurance. For other assertions, however, analytical procedures may not be as effective or efficient as tests of details in providing the desired level of assurance.