System Analysis and Design
A system design aid should primarily

generate code
using a graphical user interface
help analyse both data and activities
help in documentation

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System Analysis and Design
In a Decision tree

the root is drawn on the left and is the starting point on the decision sequence
the nodes represent the conditions, with the right wise of tree listing the actions to be taken
all of the listed here
the branch, to be followed, depends on the conditions and decisions, to be made

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