System Analysis and Design
The rule(s) to follow in constructing decision tables is (are):

all of the listed here
a decision should be given a name
standardized language must be used consistently.
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.

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System Analysis and Design
Most algorithms follow the format of

Entering the input items, then displaying the input items, and then processing the output items
Entering the input items, then processing the input items, and then displaying the output items
Entering the output items, then displaying the output items, and then processing the output items
Entering the input items, then processing the output items, and then displaying the output items
Entering the output items, then processing the output items, and then displaying the output items

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