Verification and validation (V&V) is a challenging task. There is no "silver bullet" for all V&V problems. It is therefore important to determine appropriate V&V solutions for particular contexts. Empirical evaluations can be a source of information regarding particular V&V technologies, but the studies are not useful on their own. The purpose of this research is to devise a combination strategy that uses empirical data of V&V technology evaluations. The strategy focuses on systematically selecting V&V technologies that maximise completeness and minimise effort. The combination strategy will be evaluated in the context of TestCon: a method used for verifying concurrent components. Concurrent components are difficult to verify because multiple threads execute at the same time making their behaviour non-deterministic. TestCon consists of checking for interference and deadlock, and testing the component against its functional requirements. Evaluation and refinement of TestCon through the combination strategy will investigate the effectiveness of the strategy.