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prioritizing the test cases helps to increase the rate of fault detection. The difficulty of ensuring the dependability in the growth of the scale of software and software testing in distributed environment a sufficient software testing technique is not possible. It is often difficult to test a parallel and distributed system in the real world deployment. Hence in this paper, after generating test cases using functional requirements, dependency structure prioritization technique is used to prioritize the test cases based on the functional structure of dependency. A new technique namely cosine similarity based clustering approach is used to group the test cases based on the similarity values to form clusters. Each cluster is distributed in the distributed environment for parallel execution in order to reduce the computation time and to improve the rate of fault detection. Index Terms: Cosine similarity approach, dependency structure prioritization, software testing. I. Introduction Software engineering is the systematic design and development of software products and maintenance of software. Software testing plays a major role in software engineering. Software testing is the process of validating and verifying the product to meet the requirements stated during the design and development. Software bugs will almost always exist in any software module with moderate size: not because programmers are careless or irresponsible, because the complexity of software is generally intractable and humans have only limited ability to manage complexity. It is also true that for any complex systems, design defects can never be completely ruled out. Regression testing is process of retesting the modified software and ensures that new error does not introduce into the previously tested source code due to these modifications. regression testing is very expensive testing process .in order to decrease the cost of regression testing the software tester may prioritize the test case so that the test case which are more important are run earlier during regression testing process. In this context, prioritization techniques can take advantage of information collected about the previous execution of test cases to obtain test case orderings. For regression testing the clustering technique is used for test case prioritization. in this the test case having common properties and similar fault detection ability are group together within same group. Test case prioritization improves the cost effectiveness of regression testing. The technique is developed in order to run test cases of higher priority in order to minimize time, cost and effort during software testing process.

Cosine Similarity Based Clustering For Software Testing Using Prioritization