System Analysis and Design
The black box concept is based on the assumption(s) that;

the suprasystem is stable
the relationship between the inputs and output is stable
None of these
All of these
black boxes are dependent or environments

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System Analysis and Design
Cost-Benefit analysis

compares the cost, with the benefits, of introducing a computer-based system
All of these
estimates the hardware and software costs
evaluates the tangible and non-tangible factors
None of these

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