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

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

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System Analysis and Design
Which of the following is not true of the conversion phase of the development life cycle?

documentation should be emphasized
the non machine components of the system should be considered
steps must be taken to phase out the old system
the user and systems personnel must work closely together

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System Analysis and Design
System prototyping helps the designer in

all of the listed here
making the programmers understand how the system will function.
giving a demo of the software, to the system manager to whom he reports
communicating to the user, quickly, how the system, when developed, will look like and get a feedback.

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