System Analysis and Design
In top down analyis and design

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
each succeeding phase is as detailed as the phase before it.

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System Analysis and Design
The rule(s) to follow in constructing decision tables is (are):

a decision should be given a name
the logic of the table is independent of the sequence in which conditions rules are written, but the action takes place in the order is which the events occur.
all of the listed here
standardized language must be used consistently.

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