ACCY 405 Chap.8 Triangulating Audit Evidence
Triangulating Audit Evidence
What triangulation means
The schedule pairs risk assessment with evidence triangulation, and the course objectives list triangulation among the evidence concepts that support an assurer's reasoning, along with persuasiveness, diagnosticity and predictive validity.
In the assigned monograph, triangulation happens when the auditor grasps how strongly one conclusion draws support from evidence of and from business states, information intermediaries and management representations.
Why agreement is not enough
Traditional audits compared intermediaries, such as invoices and shipping documents, with representations, such as ledgers.
The monograph's warning is that agreement between these two does not show that the records portray the business faithfully, because management usually controls both.
Consistent evidence leaves two hypotheses open, and treating it as if it chose between them is confirmation bias.
A gradient of distortion
Business evidence can be captured by the accounting system, by internal systems used to run the business, or by other organisations.
The monograph ranks these as progressively harder for management to distort, while cautioning that related parties and pressured suppliers are not independent. It distinguishes triangulation, which adds a source with different weaknesses, from replication, which retests the same source.
Levels and procedures
Triangulation applies to the statements as a whole, to classes and balances, and to assertions.
Ordinary procedures can be strengthened by reaching into the business: confirmations from customers, inspection of physical assets, or tracing from operating staff's supplier lists to the payables ledger.
Skepticism in two directions
The monograph describes skepticism aimed outward, at management's claims and the evidence management controls, and inward, at the auditor's own judgments and evidential base.
Triangulation serves both: it gives the auditor independent evidence against management's story and a way to test whether the auditor's own preferred explanation survives a different source.
What this chapter covers
- 01
Three sources of evidence
- 02
Agreement that proves too little
- 03
Confirmation bias and rival hypotheses
- 04
The distortion gradient
- 05
Replication against triangulation
- 06
Levels of magnification
- 07
Triangulated confirmations, vouching and tracing
Worked example · free
Add a third source to a two-source test
- 2Identify who controls the two sources used.
- 2State the rival hypothesis they cannot exclude.
- 2Propose evidence from outside those systems.
Key terms
- Evidence Triangulation
- Using evidence of and from business states, intermediaries and representations so that they support the same conclusion.
- Replication
- Retesting the same evidence source with more data points, which cannot remove bias built into that source.
- Confirmation Bias
- Treating evidence that merely fits a preferred explanation as if it ruled out the alternatives.
- Indirect Evidence
- Evidence about events that the client's staff observed and recorded, rather than events the auditor observed.
- Independent Evidence
- Business evidence produced by parties who have neither reason nor means to shape it for management.
Triangulating Audit Evidence FAQ
Why is a customer confirmation stronger than an invoice?
Invoices and shipping documents are produced inside the client and can be fabricated along with the ledger. An arm's-length customer stating what it owes is outside management's control and less likely to misstate the debt.
Is testing a bigger sample a form of triangulation?
No. A bigger sample from the same records is replication. It reduces sampling risk but inherits any bias in the source, whereas triangulation adds a different source with different weaknesses.
Is triangulation always required?
The monograph asks auditors to presume it for most significant risks while leaving the decision to judgment. It is often unnecessary for simple arithmetic checks and normally essential for judgments such as receivables valuation.
Exam move
For any procedure you learn, write which of the three sources it draws on, then add one step that reaches into the business. If you cannot find one, note why the procedure alone may be enough.
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