Abstract
Typically, COTS undergo frequent upgrades. Organizations while deploying these upgrades ensure the correctness of existing systems by carrying out exhaustive regression tests. This process is typically costly and time-consuming. An efficient approach to regression testing would be to execute a subset of the system test suite that provides sufficient confidence in the system behavior. In that respect, we have developed a test framework that facilitates capturing and modeling of component interactions. These interactions are analyzed to select a subset of test cases to be executed during regression testing. The approach has been applied to a web-based system and the results obtained are quite promising.