CAT / FIA FAU Syllabus D. Audit Evidence And Procedures - Using CAATs - Notes 1 / 1
CAATs use a computer to assist the auditor in testing during the audit procedures
There are 2 categories of CAAT:
Audit Software
Test Data
Audit Software
The auditor may use audit software to run the client data to check for errors
It can be an off-the-shelf software or bespoke for the client.
They can scrutinise large volumes of data, whose results can be investigated further
The software does not, however, replace the need for the auditor's own procedures
It can do the following:
select a sample using different sampling techniques
check calculations
automate the confirmation letter process
produce reports
follow transactions
Test Data
Another method which may be used by the auditor is the use of test data.
This is really putting a dummy transaction through the system to ensure that controls are working and that calculations are performed correctly
Examples of errors
Codes don't actually exist, e.g. customer, supplier and employee;
Transactions above pre-set limits, e.g. credit limits
Invoices with arithmetical errors
Auditing around the computer
Meaning the auditor does not audit how the computer works, but rather checks that the inputs generate the expected outputs from the system
This increases audit risk as the auditor cannot tell with certainty whether the internal processes of the system are working correctly
It is very difficult to determine why errors occurred
Also fixing them may need an external expert
Advantages & Disadvantages of CAATs
Advantages
Independently access computer data
Test the reliability of client software
Increase the accuracy of audit tests
Perform audit tests more efficiently
Disadvantages
CAATs can be expensive and time consuming to set up
Client permission and cooperation may be difficult to obtain
Potential incompatibility with the client's computer system
The audit team may not have sufficient IT skills
Data may be corrupted or lost during the application of CAATs