Technical Metrics Of Object Oriented Systems Oes Tsetnoc

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• To better understand product quality

• To assess process effectiveness

• To improve quality of the work performed

at the project level

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• Metrics for any engineered product are governed by the unique characteristics of the product.

• There are 5 characteristics that lead specialized metrics according to Berard. They are localization, encapsulation, information hiding, inheritance, and object abstraction techniques

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- a characteristic of software that indicates the manner in which information is concentrated within a program.

- information is concentrated by encapsulating both data and process within the bounds of a class or object

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• “the packaging” (or binding together) of a collection of items.

• encompasses the responsibilities of a class, including its attributes (and other classes for aggregate objects) and operations, and the states of the class, as defined by specific attribute values

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• suppresses (or hides) the operational details of a program component. Only the information necessary to access the component is provided to those other components that wish to access it.

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• a mechanism that enables the responsibilities of one object to be propagated to other objects. Inheritance occurs throughout all levels of a class hierarchy.

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• a mechanism that enables the designer to focus on the essential details of a program component (either data or process) with little concern for lower-level details.

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• OO metrics represent abstractions in terms of measures of a class (e.g., number of instances per class per application, number or parameterized classes per application, and ratio of parameterized classes to non-parameterized classes)

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FELIXBERTO BAGUYO, JR.