The present invention relates to a testing tool for testing of complex software systems having a plurality of interrelated system components and a suite of test scenarios for testing the performance of the plurality of interrelated system components. The testing tool includes an Automated Multidimensional Traceability Matrix system for determining linkages between interrelated system components, a means for identifying a change in one or more of the interrelated system components, a means for applying the Automated Multidimensional Traceability Matrix, a means for executing all of or a subset of the test scenarios associated with the interrelated system components that may be affected by the change and a means for evaluating the results of the executed test scenarios.