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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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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