Brij Mohan Goel
Abstract
In object-oriented systems, assessing reusability plays a key role in reducing a cost and improving the quality of the software. Objectoriented programming helps in achieving the concept of reusability through different types of inheritance programs, which further help in developing reusable software modules. And object-oriented metrics identify the effectiveness of each reuse strategy. Software reusability has considerable effect on software quality. Software quality increases as reuse of software components increases. But software quality improvement cannot be understood unless it is measured. This paper focuses on an empirical evaluation of object-oriented metrics in C++ using three different object-oriented features. Three programs have been considered as input for the study -- the first program uses multilevel inheritance, the second program uses multiple inheritance and the third program uses hierarchical inheritance. We have found that multilevel inheritance has more impact on reusability among these three features.
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Index Terms
- Analysis of reusability of object-oriented systems using object-oriented metrics
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Reviews
Alberto Sampaio
Despite a large number of studies, more evidence is needed on the validity of existing metrics, to help software engineers choose the right ones for each situation. This paper presents one such empirical study to evaluate a suite of object-oriented (OO) metrics, using OO characteristics such as multilevel inheritance, multiple inheritance, and hierarchical inheritance, to find their impact on reusability. The suite, based on CK metrics [1], was applied to three C++ programs to measure inheritance, coupling, and cohesion. The authors conclude that multilevel inheritance has the largest impact on reusability. They also note, using the word "proves," that the metrics provide a correct evaluation of OO systems. The paper does not show clear evidence relating the metrics suite with its intended use in the study-what they imply for reusability-although the argumentation makes sense. Moreover, the programs are too simple. The authors refer to their own paper [2] when presenting the suite, so the reader is forced to go look it up. The reference is very similar, though with only one study involving a very small C++ program. How can the authors be so confident in their suite, and results, with such weak evidence__?__ Unfortunately, the paper shows to a limited extent the usefulness of the suite, without "proving" it. I was somewhat disappointed with the value of the paper, but I found some of the references useful. I did find an error in the title of section 6, which is common to both papers. Online Computing Reviews Service
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