The most effective means for an AUDITOR to confirm his understanding how internal control over financial reporting is designed and operates to test and evaluate its effectiveness. It involves making inquiries of and observing personnel who actually perform the controls; reviewing documents which are used in, and that result from, application of the controls; and comparing supporting documentation to accounting records. In a walkthrough, auditor traces a transaction from origination through the company's information systems to point where it is reflected in the company's financial reports.