System Analysis and Design
System Study involves

documenting the existing system.
All of the listed here
identifying current deficiencies and establishing new goals
study of an existing system

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System Analysis and Design
An audit trial is

designed to permit tracing of any input record or process performed on a system, back toits original sources
post-auditing the system after its implementation
All of these
test data used by the system auditor
None of these

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