System Analysis and Design
In a Decision tree

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

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System Analysis and Design
System prototyping helps the designer in

giving a demo of the software, to the system manager to whom he reports
all of the listed here
making the programmers understand how the system will function.
communicating to the user, quickly, how the system, when developed, will look like and get a feedback.

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