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UNIT 6 - COMPUTERS - Coggle Diagram
UNIT 6 - COMPUTERS
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INPUT CONTROLS
Validity of input
- Access control
- Segregation of duties
- Authorisation
- Overrides of system generated information
- Changes in data
Accuracy of input:
- Matching by the computer
- Review by users or senior staff
- Edit checks
- Staff training
- Controls over documents
- Control over screens
Types of edit checks:
- Field presence checks
- Formatting checks
- Screen Checks
- Validity or existence check
- Limit or reasonableness check
- Dependency check
- Field size check
- Screen prompts
- Logic Check
- Sign Check
- Specific character check
- Arithmetic check
Completeness of input:
- Stationary controls
- Matching by the computer
- Sequential testing by the computer
- Review of output reports by users
- Examining of processing logs
- Control totals
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SYSTEM SOFTWARE
- In the processing by users on personal computers there must be control over the software
- Acquisition and development controls
- Security over system software
- Database systems
- Networks
- Processing on microcomputers
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