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

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

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System Analysis and Design
A system analyst designs a new system by

None of these
propose alternatives to the current system
identifying sub systems and the interfaces between sub systems
developing the system as a large, single unit
adopting a developed system to the present environment

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