On Comparing and Complementing two MBT approaches

At INPE¹ researchers and software engineers have been using Statechart-based testing for some time to test on-board satellite software. On the other hand, a group of researchers at CIFASIS² and Flowgate Consulting have been applying Z-based testing for unit testing. Both groups started to compare their approaches and tools a year ago. What started as a comparison to share ideas and results, is now turning into the realization that actually both techniques complement and benefit from each other, yielding a more effective and wider Model-Based Testing (MBT) approach. In this paper we present the results obtained so far in comparing and complementing these two MBT techniques.