System Analysis and Design
The systems conversion technique of totally removing the existing system and immediately implementing the new system is called a

None of these
crash conversion
pilot conversion
phased conversion
parallel run

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System Analysis and Design
In top down analyis and design

each succeeding phase is as detailed as the phase before it.
all of the listed here
each succeeding phase is more detailed than the phase before it
each succeeding phase is less detailed than the phase before it

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