System Analysis and Design
Sequential organization

Stores records sequentially but uses an index to locate records
None of these
has records placed randomly throughout the file
means storing records in contiguous blocks according to a key.
uses an index for each key type

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System Analysis and Design
A Decision table

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

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