Evidence and testing considerations

Welcome to the Heart of the Audit: Evidence and Testing

Hello there! Welcome to one of the most critical chapters in your AAA journey. If the audit plan is the "map," then Audit Evidence is the "treasure" we are looking for. Without evidence, an auditor is just someone with an opinion and no proof. In this chapter, we will explore how to gather evidence that is strong enough to support our audit report.

Don't worry if this seems like a lot of technical rules at first. Think of yourself as a financial detective. Your job is to look at what the company says they have and prove whether they are telling the truth or not. Let’s dive in!

1. The Golden Rule: Sufficiency and Appropriateness

According to ISA 500 Audit Evidence, the auditor must obtain sufficient appropriate audit evidence. These are two fancy words for "Quantity" and "Quality."

Sufficiency (Quantity)

This is about "how much" evidence you have. If you are auditing a bank balance of $10 million, looking at a single $5 receipt isn't enough. The amount of evidence you need depends on the Risk of Material Misstatement (RoMM).
Analogy: If you're trying to prove it's raining, one drop on your window might not be enough (it could be a sprinkler). You need to see many drops to be sure.

Appropriateness (Quality)

This is about how "good" the evidence is. It must be both:

• Relevant: It must actually prove the thing you are worried about. If you want to check if a car exists, looking at the insurance document is okay, but physically touching the car is better!
• Reliable: Some evidence is more trustworthy than others.
Quick Tip: External evidence (from a bank) is more reliable than internal evidence (from the client). Original documents are better than photocopies.

Summary of Evidence Reliability:

1. External is better than Internal.
2. Direct (auditor saw it) is better than Indirect (someone told the auditor).
3. Written is better than Oral.
4. Originals are better than Copies.

2. The "What" and "How": Assertions and Procedures

When management gives you financial statements, they are making "Claims" or Assertions. As an auditor, your testing must challenge these assertions.

The Assertions Mnemonic: C-C-E-A-V-O-P

To help you remember what we test, think of these key categories:

• Completeness: Is everything recorded that should be? (No hidden "off-balance sheet" debts!)
• Cut-off: Are transactions in the right year? (Did they sneak next year's sales into this year?)
• Existence: Do the assets actually exist? (Or is that "Gold Mine" just a hole in the ground?)
• Accuracy/Valuation: Are the numbers right? (Did they value their old inventory at the correct price?)
• Obligations and Rights: Does the company actually own the assets? (Or are they just renting them?)
• Presentation: Is everything described clearly in the notes?

How we get evidence (The Procedures)

Think of the mnemonic A-E-I-O-U to remember your testing methods:

• A - Analytical Procedures: Looking at trends and ratios (e.g., Why did profit go up while sales went down?).
• E - Enquiry: Asking management questions (but remember, you must always verify their answers!).
• I - Inspection: Looking at documents or physical assets.
• O - Observation: Watching a process (like a stock count).
• U - RecalcUlation: Checking the math yourself (e.g., re-adding a depreciation schedule).

Quick Review: You don't just "do" a procedure. You do a procedure to test an assertion. For example: "Inspect (Procedure) the purchase invoice to ensure the asset is valued (Assertion) correctly."

3. Auditing Accounting Estimates (ISA 540)

Estimates are things like "Expected Credit Losses" or "Fair Value of Property." These are the hardest things to audit because there is no "perfect" right answer—it's based on management's judgment.

Key Approach:
1. Review the outcome: Look at last year's estimate. Were they way off? If so, be skeptical of this year's estimate.
2. Test the method: Is the formula they used logical?
3. Test the data: Is the information they put into the formula accurate?
4. Develop your own range: Instead of just saying "Yes" or "No," the auditor often calculates a range of what is reasonable. \( Range = [Lowest Possible Value] \leftrightarrow [Highest Possible Value] \)

Common Mistake: Students often forget to mention Professional Skepticism here. Because estimates are subjective, management might try to "window dress" the accounts. You must stay alert to management bias!

4. Using the Work of Others

Sometimes, we aren't experts in everything (like valuing a diamond mine or complex actuarial pension math). In these cases, we can use Auditor's Experts (ISA 620) or Internal Auditors (ISA 610).

The "CCO" Test

Before you rely on someone else's work, you must check their:

1. Competence: Do they have the right qualifications?
2. Capability: Do they have the time and resources?
3. Objectivity: Are they independent? (If the expert is the CEO's brother, we have a problem!)

Did you know? Even if you use an expert's report, YOU (the auditor) are still 100% responsible for the audit opinion. You can't blame the expert if the audit goes wrong!

5. Automated Tools and Techniques (ATT)

In the modern world, we don't just look at paper files. We use Data Analytics. This allows us to test 100% of a population instead of just a small sample.

• Example: Instead of checking 20 invoices, a computer program can check all 50,000 invoices in a second to see if any are missing or duplicated.
• Benefit: Higher quality evidence and better focus on "outliers" (strange transactions).

6. Summary and Final Tips for the Exam

Key Takeaway: Audit evidence is about proving the assertions management has made. Your exam answers should always link a specific procedure (what you do) to a specific risk/assertion (why you do it).

Pro Tip for Struggling Students: If you get stuck on an exam question asking for "Audit Procedures," use the D-D-D rule:
1. Document: What document will you look at? (e.g., Purchase Invoice)
2. Detail: What detail are you looking for? (e.g., the date and amount)
3. Decision: What assertion are you proving? (e.g., Cut-off or Accuracy)

Example: "Inspect the title deeds (Document) to confirm the company's name is listed (Detail) to prove the assertion of Rights and Obligations (Decision)."

Keep going! This chapter is the foundation of the entire exam. Once you master how to gather evidence, you are well on your way to passing Advanced Audit and Assurance!