AIRCC's International Journal of Computer Science and Information Technology

Abdullah ¹, M. H. Khan ², Reena Srivastava ¹

Affiliations
1 School of Computer Application, BBD University, Lucknow, IN
2 Department of C.S. E., I.E.T., Lucknow, IN

Abstract

Measuring testability early in the development life cycle especially at design phase is a criterion of crucial importance to software designers, developers, quality controllers and practitioners. However, most of the mechanism available for testability measurement may be used in the later phases of development life cycle. Early estimation of testability, absolutely at design phase helps designers to improve their designs before the coding starts. Practitioners regularly advocate that testability should be planned early in design phase. Testability measurement early in design phase is greatly emphasized in this study; hence, considered significant for the delivery of quality software. As a result, it extensively reduces rework during and after implementation, as well as facilitate for design effective test plans, better project and resource planning in a practical manner, with a focus on the design phase. An effort has been put forth in this paper to recognize the key factors contributing in testability measurement at design phase. Additionally, testability measurement model is developed to quantify software testability at design phase. Furthermore, the relationship of Testability with these factors has been tested and justified with the help of statistical measures. The developed model has been validated using experimental tryout. Finally, it incorporates the empirical validation of the testability measurement model as the author's most important contribution.

Keywords

Testability, Object Oriented Metrics, Testability Factors, Testability Measurement, Design Phase, Development Life Cycle.

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Nidhi Goyal ¹, Reena Srivastava ²

Affiliations
1 BBDU, Lucknow, IN
2 School of Computer Applications, BBDU, Lucknow, IN

Abstract

Changeability has a direct relation to software maintainability and has a major role in providing high quality maintainable and trustworthy software. The concept of Changeability is a major factor when we design and develop software and its constituents. Developing programs and its constituent components with good changeability continually improves and simplifies test operations and maintenance during and after implementation. It encourages and supports improvement in software quality at design stage in the development of software. The research here highlights the importance of changeability broadly and also as an important aspect of software quality.

In this paper a correlation between the major attributes of object oriented design and changeability has been ascertained. A changeability evaluation model using multiple linear regression has been proposed for object oriented design. The validation of the proposed changeability evaluation model is made known by means of experimental tests and the results show that the model is highly significant.

Keywords

Object Oriented Design, Changeability, Maintainability Evaluation, Software Quality, Empirical Validation.

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