Ajiboye, A.R.Mejabi, O.V.Salihu, S.A.2018-12-032018-12-032017ILORIN JOURNAL OF COMPUTER SCIENCE AND INFORMATION TECHNOLOGYhttp://hdl.handle.net/123456789/1331ArticleA test case is a set of input data designed to discover a particular type of error or defect in the software system. In order to develop software that perform as expected, extensive testing should be carried out to ensure reliability. Ideally, software testers would want to test every possible permutation of the software, but in practice, due to the complexity of the software, exhaustive testing is usually not feasible. This paper presents the use of tway interaction techniques with a view to reducing the number of test cases in the process of software testing. The software on which the approach is implemented consists of parameters that have the same number of values and their interaction is based on pairwise combination. The technique minimizes the number of test cases as it tests all pairs of variables. The resulting outputs show a significant reduction in the number of test cases from 8 to 6; this is a 25 % reduction. Thus, the overall time required to test the software is optimized. Also, the final reduced test cases are found to be free of redundancy and the technique used shows a high degree of parameter interaction.enTest casesTest planTest suiteSoftware testingT-way pairwise interaction.Article