Introduction to Design Methods
Data design is also called as the data architecting. Data designs the first of three design activites that are conducted during software engineering. Data design creates a to level model of data and information that is represented at a high level of abstraction. This data model is then refined into progressively more implementation specific representation that can be processed by the computer based system. The process of data design is summarized by Wassermann.
The primary activity during data design is to select logical representations of data objects ( data structures ) identified during the requirements definition and specification phase. The selection process may involve algorithmic analysis of alternative structures in order to determine the most efficient design or may simply involve the use of a set of modules that provide the desired operations upon some representation of an object.
An important related activity during design is to identify those program modules that must operate directly upon the logical data structures. In this way the scope of effect of individual data design decision can be constrained.
As such the well designed data can lead to better program structure effective modularity and reduced rocedural complexity.
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