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Difficulty: MediumComparison of Manual and Computerized Accounting Systems

A growing retail company recently switched from a manual ledger system to an enterprise computerized accounting package. The managing director believes that because the software automatically calculates account balances and posts entries, internal controls are no longer necessary. Which of the following is the most accurate assessment of this belief?

  1. It is incorrect because computerized systems still require controls over physical access, user permissions, and input data accuracy to prevent fraud and errors.Answer
  2. B
    It is correct because computerized software automatically generates audit trails that eliminate any risk of unauthorized data modification.
  3. C
    It is correct because automated posting changes the nature of accounting from analytical record-keeping to routine manual bookkeeping.
  4. D
    It is incorrect because computerized accounting systems process transactions exclusively in periodic batches without real-time security risks.

Answer

It is incorrect because computerized systems still require controls over physical access, user permissions, and input data accuracy to prevent fraud and errors.
The assessment that internal controls are unnecessary in a computerized system is false. While computerized accounting systems automate arithmetic calculations and routine posting, they introduce distinct risks such as unauthorized file access, software manipulation, and erroneous input processing. Therefore, robust internal controls—including password restrictions, user roles, audit trails, and input verification—remain essential for maintaining data accuracy and security.

Step-by-Step Solution

1
Analyze how transaction processing differs between manual and computerized accounting systems.
In manual accounting, ledger posting and trial balance extraction require human manual calculation. In computerized systems, posting and arithmetic balancing occur instantly and automatically upon data input.
Understanding operational differences highlights where clerical errors are eliminated and where new system risks emerge.
2
Evaluate internal control requirements within a computerized environment.
Although computerized systems eliminate computational errors, they remain vulnerable to incorrect input ('Garbage In, Garbage Out'), unauthorized system access, software tampering, and lack of segregation of duties.
Automation shifts control focus from mathematical checking to access management, input validation, and system security.
3
Determine the validity of the managing director's belief.
The belief is false because computerization alters the form of internal controls required but does not eliminate the necessity for internal financial controls.
Effective internal control remains mandatory regardless of whether an accounting system is manual or computerized.

Key Concept

Internal Controls in Computerized vs. Manual Accounting Systems
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Topics

Comparison of Manual and Computerized Accounting Systems