Metamorphic relation prioritization for effective regression testing

Metamorphic testing (MT) is widely used for programs that face the oracle problem. It uses a set of metamorphic relations (MRs), which are among multiple inputs and their corresponding outputs to determine whether program under test faulty. Typically, MRs vary in ability detect faults test, some tend same faults. In this paper, we propose approaches prioritize improve efficiency effectiveness MT regression testing. We present two MR prioritization approaches: (i) fault-based (ii) coverage-based. To evaluate these approaches, conduct experiments on three complex open-source software systems. Our results show developed by us significantly outperform current practice executing source follow-up cases an ad-hoc manner terms fault detection effectiveness. Further, leads reducing number needs be executed as well average time taken fault, would result saving cost during process.