System Analysis and Design
Direct-access organization

means storing records in contiguous blocks according to a key.
has records placed randomly throughout the file
Stores records sequentially but uses an index to locate records
uses an index for each key type

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System Analysis and Design
A Decision table

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

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