System Analysis and Design
A Decision table

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

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System Analysis and Design
The approach used in top-down analysis and and design is

to identify a top level function and then create a hierarchy of lower level modules and components
to prepare flowcharts after programming has been completed
All of these
to identify the top level functions by combining many smaller components into a single entity.
None of these

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