CISA Domain 1 Guaranteed Success
Definitions and Concepts: - Interviewing and Observing Personnel ️ - Actual Functions: An adequate test to ensure that the individual who is assigned and authorized to
perform a particular function is the person who is actually doing the job. ️ - Actual Proc...
CISA Domain 1 Guaranteed Success
Definitions and Concepts:
- Interviewing and Observing Personnel ✔️
- Actual Functions: An adequate test to ensure that the individual who is assigned and authorized to
perform a particular function is the person who is actually doing the job. ✔️
- Actual Processes and Procedures: Allows the IS auditor to gain evidence of compliance and observe
deviations, if any. ✔️
- Security Awareness: Should be observed to verify an individual’s understanding and practice of good
preventive and detective security measures. ✔️
- Reporting Relationships: Should be observed to ensure that assigned responsibilities and adequate
segregation of duties are being practiced. ✔️
- Observation Drawbacks: The observer may interfere with the observed environment. People when
observed may change their behaviors. ✔️
- Statistical Sampling ✔️
- An objective (math-based) method of determining the sample size and selection criteria. ✔️
- Uses the mathematical laws of probability. The IS auditor quantitatively decides how closely the
sample should represent the population. ✔️
- Nonstatistical Sampling ✔️
- Uses auditor judgment to determine the method of sampling. These judgments are based on
subjective (decision-based) judgment as to which items/transactions are the most material and most
risky. ✔️
- Attribute Sampling ✔️
- Sampling model used to estimate the rate of occurrence of a specific quality in a population. Answers
the question of "how many." ✔️
- Types:
, - Stop-or-go Sampling: A model that helps prevent excessive sampling of an attribute by allowing an
audit test to be stopped at the earliest possible moment. Used when very few errors will be found in a
population. ✔️
- Discovery Sampling: A model that can be used when the expected occurrence rate is extremely low.
Used when the audit's objective is to seek out fraud or other irregularities. ✔️
- Variable Sampling ✔️
- Technique used to estimate the monetary value or some other unit of measure of a population from a
sample portion. ✔️
- Types:
- Stratified mean per unit: A statistical model in which the population is divided into groups, and
samples are drawn from various groups; used to produce a smaller overall sample size than unstratified
mean per unit. ✔️
- Unstratified mean per unit: A model in which a sample mean is calculated and projected as an
estimated total. ✔️
- Difference Estimation: A statistical model used to estimate the total difference between audited
values and book values based on differences obtained from sample observations. ✔️
- Confidence Coefficient ✔️
- A percentage that expresses the probability that the characteristics of the sample are a true
representation of the population. 95% is considered a high degree of comfort. ✔️
- If internal controls are strong, the confidence coefficient may be lowered, and the sample size
reduced. ✔️
- Expected Error Rate ✔️
- An estimate stated as a percentage of errors that may exist. The greater the expected error rate, the
larger the sample size needed. ✔️
- Applied to attribute sampling, not variable sampling. ✔️
- Tolerable Error Rate ✔️
- The maximum misstatement or number of errors that can exist without an account being materially
misstated. ✔️
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