System Analysis and Design
System Study involves

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

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System Analysis and Design
The black-box concept:

All of these
is invoked by describing a system in terms of inputs and outputs, leaving the transformation process a black box.
assumes that inputs and outputs will remain stable
None of these
assumes that the black box is independent

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