Walkthrough or Test of Controls: Is the Auditor Understanding the Process or Testing Reliance?
A walkthrough helps the auditor understand and confirm the process. A test of controls evaluates whether a control operated effectively enough to support reliance.
Walkthrough
The auditor traces a transaction through the system using inquiry, observation, and inspection to understand how controls are designed and implemented.
Test of controls
The auditor obtains evidence about whether a specific control operated effectively during the period.
Overlap
A walkthrough can include evidence about implementation, but that does not automatically provide enough evidence for operating-effectiveness reliance.
Exam strategy
Ask whether the objective is to understand the process or reduce control risk through reliance.
The takeaway
Walkthroughs are primarily about understanding design and implementation. Tests of controls are about operating effectiveness over the relevant period.
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FAQ
Does a walkthrough automatically prove year-long operating effectiveness?
No.
Can a walkthrough involve inquiry and observation?
Yes.
Are tests of controls required in every audit?
No.