Test Checking

(b) Test Checking — Definition, Factors, Advantages, Limitations

Definition. Test Checking is the technique of selecting and examining only a

representative SAMPLE of transactions from a large volume, rather than checking every single one,

and drawing a reasonable conclusion about the accuracy/reliability of the WHOLE set of

transactions from the result of examining that sample. It is used precisely because 100%

verification of every transaction (routine checking, applied to a very large volume) is often

neither practically feasible nor economically justified.

Factors to be considered before Test Checking:

An auditor cannot simply pick transactions at random without thought — the choice of sample size

and which items to select must be based on genuine judgment, guided by:

1. The size of the business and the volume of transactions — a larger volume generally justifies (and often necessitates) a smaller PROPORTION being tested, though the absolute number examined may still be substantial.
2. The strength of the internal control/internal check system (Class XI Ch9) — the stronger and more reliable the client's own internal check, the smaller the sample the auditor may reasonably need to test; a weak internal check justifies a larger sample.
3. The nature of the transactions — routine, repetitive, low-value transactions are generally suitable for test checking; unusual, high-value, or one-off transactions generally are NOT (see Section d below).
4. The materiality of the item — items that are individually significant in value, or that carry a higher inherent risk of error/fraud, should be checked more thoroughly, or in full, rather than merely sampled.
5. Selecting a genuinely representative sample, spread across the whole period under audit (not concentrated in just one month, say) and across different types of transactions, so the conclusion drawn is not skewed by an unrepresentative selection.
6. Rotation of the sample from year to year, so that different transactions are tested each audit, making it harder for staff to anticipate which items will be checked and adjust their behaviour accordingly.

Advantages of Test Checking:

1. Saves time and cost significantly compared to checking every single transaction, which is especially valuable for a business with a large volume of routine transactions.
2. Makes an audit practically feasible at all, within a reasonable time and fee, for a large organisation where 100% checking would simply not be commercially viable.
3. Allows audit effort to be concentrated on higher-risk, more material areas instead of being spread thin and mechanically across every single low-risk entry.
4. A well-designed sample can still give reasonable assurance about the whole population, provided the sample is genuinely representative.

Limitations of Test Checking:

1. Carries an inherent sampling risk — an error or fraud that happens to fall OUTSIDE the sample selected will simply not be detected, however carefully the sample itself is chosen. …