A comparative study of d∗framework and GSN

Recently, serious failures of complex IT systems are becoming social problems. Assurance case has been attracted as the technique of assuring the dependability of critical systems in such a situation. We have proposed d*framework which is an extended assurance case notation based on the network of dependable actors. In this paper, we show the result of a case study to evaluate the effectiveness of d*framework as follows. First, an assurance case of GSN is translated equivalently into d*framework. Then, experiments are designed to compare effectiveness of GSN and d*framework. Finally, experimental hypotheses are evaluated by the results. An extended version of D-Case Editor is also used to describe GSN and d*framework assurance case in case study.