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  Design Methods

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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