System Analysis and Design
The two classification of inputs are:

energies and maintenance
None of these
products and waste
maintenance and waste
maintenance and signal

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System Analysis and Design
Direct-access organization

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

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System Analysis and Design
A Decision table

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

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