Audit II midterm Flashcards
3 approaches to selecting sample items
Select all items
Select specific items- by a characteristic (key item) or all items over a certain dollar amount
Audit sampling
3 factors that determine sample size
Confidence level- desired level of assurance
Tolerable error- acceptable defect rate
Expected error- historical defect rate
Audit sampling
The application of audit procedures to less than 100 percent of the items in a population of audit relevance selected in such a way that the auditor expects the sample to be representative of the population and thus likely to provide a reasonable basis for conclusions about the population
Sampling risk
risk that sample selected is not representative of the population and lead auditor to a different conclusion than if the population were tested
Precision (Allowance for sampling risk) equation
Tolerable error - Expected error
Statistical sampling
Must comply with all laws of probability to compute sample size. Each number must have same probability of being chosen. Any judgement that comes into play makes it non statistical
Pros: Quantify sampling risk, efficient sample
Cons: Training auditors, timely, inconsistency
Non-statistical sampling
Judgement in sample size
Haphazard sample size (auditor selects sample, may be unknown bias)
Must test individually significant items 100%
Cannot quantify upper deviation rate or sampling risk
Monetary Unit Sampling (MUS)
Substantive test, most common method for balances of transactions
Can be quantified
Population: monetary value of an account balance
Each unit is an individual dollar
Misstatement- difference between monetary amounts
Dollars are organized into “logical units”
Confidence level
100% - Sampling risk
The desired level of assurance that the sample results will support a conclusion that the control is functioning effectively.
Generally, when the auditor has decided to rely on controls, the confidence level is set at 90% or 95%.
Tolerable deviation rate
The maximum deviation rate from a prescribed control that the auditor is willing to accept and still consider the control as operating effectively.
Typically 3-5% for high importance, 6-10% for moderate
What determines if accounts are materially misstated, and what to do afterward
If Upper misstatement > Tolerable misstatement, accounts are materially misstated
• Increase the sample size
○ If more misstatements are found then, request client adjust balance
• Perform other substantive procedures
Request client adjust accounts receivable balance
Substantive tests steps
Select a representative sample of items
Calculate the difference between audited values and recorded values for each sampled item
Estimate the population error by multiplying the average error rate in the sample to the population
Adjust for sampling risk (Upper confidence limit)
If the upper confidence limit is less then materiality then the auditor can conclude there is no material misstatement
Disadvantages of MUS
Special consideration for zero or negative balances
Assumes error is not more than 100% of audited amount
Sample results may overstate allowance for sampling risk
Fundamental concepts in Auditing
Integrity Critical thinking Skepticism Verification Independence Validating evidence
agency theory
Assumes principal has different objectives than the agent, and principal does not know agent’s type of actions
Information risk
risk that principal makes decisions improperly based on information provided
Audits became mandatory in _____
1929, after stock market crashed
Major SOX reforms
• Prohibits auditors from Bookkeeping
• Audit committee must hire and fire external auditor
• Audit must pre-approve all non audit services
• Cooling off period: one year period before a member of the audit engagement team can accept an employment at an audit client
• CEO and CFO must certify financial statements
• Established PCAOB- all firms must register and must be inspected either every year or 3 years depending on size of the firm
○ PCAOB has 18 standards: AS1 to AS18
AS 2201 is one of the most important standards
3 required committees on board
Audit committee
Compensation committee
Nomination and governance committee
PCAOB inspections
Inspect quality of individual audit engagements
Inspect the audit firm’s quality control system
Every year for >100 firms, every 3 years for small firms
50 to 70 engagements- Big 4 audit firm
20 to 40 engagements- mid-tier audit firm
1 to 6 engagements- small audit firm
Inspections- areas with frequent deficiencies
Audit sampling procedures (i.e. sampling done improperly) Revenues Inventory and Accounts Receivable Related party transactions Internal control testing Going concern assessments
Audit committee responsibilities
Oversee the financial reporting and disclosure process
Be responsible for the appointment, compensation and removal of the external auditor
Discuss with external auditor the nature and scope of the audit
Discuss problems arising from external and internal audits
Act as a buffer between auditors and management
Review interim and annual financial statements
Sequence of an audit (acceptance to completion)
Client acceptance including engagement letter Risk assessment Audit plan Test and evaluate internal controls Substantive testing Audit completion and reporting
Engagement letter
Contract that lines out auditor’s and management responsibility
Should NOT include audit procedures
Tests of Internal Controls
Inquiry Observation Inspection Designed properly? Applied consistently? Who performs controls?
Substantive tests
Details of transactions and account balances
Transaction assertions
Occurrence Completeness Authorization Accuracy Cutoff Classification
Authorization assertion
All transactions are authorized by appropriate personnel
Accuracy assertion
Transactions are recorded in full amount without errors
Cutoff assertion
Transactions are recorded in the period in which they occurred
Classification assertion
Transactions are recorded in proper account