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{{Short description|Data analysis software}}
{{Multiple issues|
{{Essay-like|article|date=August 2009}}
{{Cleanup rewrite|date=December 2023}}
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'''Computer-assisted audit tool''' (CAATs) or '''computer-assisted audit tools and techniques''' (CAATTs) is a growing field within the IT audit profession. CAATs is the practice of using computers to automate the IT audit processes. CAATs normally include using basic office [[productivity software]] such as [[spreadsheet|spreadsheets]], [[word processors]] and text editing programs and more advanced software packages involving use [[statistical analysis]] and [[business intelligence]] tools. But also more dedicated [[#Specialized software|specialized software]] are available (see below).
▲CAATs have become synonymous with [[data a
==Traditional auditing vs CAATs==
===Traditional audit example
The traditional method of auditing allows auditors to build conclusions based upon a limited sample of a population, rather than an examination of all available or a large sample of data.
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===Traditional audit vs CAATTs on specific risks===
Another advantage of CAATTs is that it allows auditors to test for specific risks. For example, an insurance company may want to ensure that it doesn't pay any claims after a policy is terminated. Using traditional audit techniques this risk would be very difficult to test. The auditor would "randomly select" a "statistically valid" sample of claims (usually if any of those claims were processed after a policy was terminated). Since the insurance company might process millions of claims the odds that any of those 30–50 "randomly selected" claims occurred after the policy was terminated is extremely unlikely.
Using CAATTs the auditor can select every claim that had a date of service after the policy termination date. The auditor then can determine if any claims were inappropriately paid. If they were, the auditor can then figure out why the controls to prevent this failure. In a real-life audit, the CAATTs auditor noted that several claims had been paid after policies were terminated. Using CAATTs the auditor was able to identify every claim that was paid and the exact dollar amount incorrectly paid by the insurance company. Furthermore, the auditor was able to identify the reason why these claims were paid. The reason why they were paid was because the participant paid their premium. The insurance company, having received a payment, paid the claims. Then after paying the claim the participant's check bounced. When the check bounced, the participant's policy was retrospectively terminated, but the claim was still paid costing the company hundreds of thousands of dollars per year.
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===Creation of electronic work papers===
Keeping electronic work papers on a centralized audit file or database will allow the auditor to navigate through current and archived working papers with ease. The database will make it easier for auditors to coordinate current audits and ensure they consider findings from prior or related projects. Additionally, the auditor will be able to electronically standardize audit forms and formats, which can improve both the quality and consistency of the audit working papers.
===Fraud detection===
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| [[Easy2Analyse]] || QDAC.net. || 4.3 || 2015-05-15 || [[Windows]] || {{Nonfree|[[Proprietary software|Proprietary]] [[Commercial software|commercial]]}} || {{No}} ||Available in full and auditfiles version
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| Intrasoft Audit Support Computer Audit (Formerly known as ESKORT / SESAM) || Intrasoft International || 7.
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| [[InfoZoom]] || humanIT || 9.0.5 || 2016-11-07 || [[Windows]] || {{Nonfree|[[Proprietary software|Proprietary]] [[Commercial software|commercial]]}} || {{No}} ||
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