As a practical problem stands, we (i.e., software developers) cannot build software without any faults. We need to make concerted efforts to find and fix faults in software. However, considering the practical issue, we inevitably face on software failures. Therefore, we now need to presuppose an occurrence of software failures; when a software application fails, we must immediately and precisely maintain it. For supporting the technical and laborious tasks, we develop state-of-the-art technologies on test automation and automated program repair. Our aim is to create the world in which we can concentrate on our creative work.