Using three-tier strategy based on GQM to generate test case metircs

Test cases play an important role in variety of testing activities. While how to generate suitable test cases and meet testing adequacy requirements? In this paper, we borrowed an idea from Goal Question Metric (GQM) and have constructed three-tier strategy to generate test cases in a measureable framework. Besides the presentation of the approach, we have conducted a case study, where the suitability of the approach is investigated in generating the test case metric of the interface testing context. And threats to validity are analyzed, at last future work is proposed.