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

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System Analysis and Design
Sequential or series testing is

making sure that the new programs do in fact process certain transactions according to Specifications
running the system with line data by the actual user
is checking the logic of one or more programs in the candidate system
testing changes made in an existing or a new program

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System Analysis and Design
A Decision table

represents the information flow
documents rules, that select one or more actions, based on one or more conditions, from a set of possible conditions.
shows the decision paths
gets an accurate picture of the system

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