Step-by-step system construction technique with assurance technology-evaluation measure for step-by-step system constructioni

Recently the system needs of growing systems including heterogeneous functions and operations have increased. An assurance system that achieves high reliability and high availability is very important for such systems. In order to realize a high assurance system, we researched the step-by-step construction technique with assurance technology. In this paper we mainly discuss the evaluated measure for step-by-step construction. Functional reliability and online functional availability are the best measures for deciding the order of step-by-step system construction. According to the measure, functional group construction is the best solution.