Friday, January 4, 2008

Overview on External and Internal Design

External Design

In this phase, the full details of the system functions, screen and report formats, external interfaces, security and audit controls, operational procedures, recovery and contingency procedures and reponse times are defined.

Internal Design

This phase is concerned with the internal details of the system such as databases/files, records and programs. For each program it defines the functions it performs, the files accessed and the input and/or outputs processed.

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