System Analysis and Design
A Decision table

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

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System Analysis and Design
Positive testing is

running the system with line data by the actual user
testing changes made in an existing or a new program
is checking the logic of one or more programs in the candidate system
making sure that the new programs do in fact process certain transactions according to Specifications

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