System Analysis and Design
A Decision table

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

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System Analysis and Design
Positive testing is

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

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