Assurance Technology of System Tests Based on Operators' Aspects

As systems have been integrated into networks, they are required to operate in an environment that includes heterogeneous demands and modes. The heterogeneous requirements have to be met and the heterogeneous modes have to coexist under an evolving situation. Then a system management and maintenance cost are significantly increased in comparison with system construction. Change, such as integration, combination, or renewal, to a large scale and complex system has great influence on the operators of systems. However, evaluation based on the operators’ aspects has not yet been carried out. The conventional system evaluation is based on the user’s viewpoint of how to measure the effect of not providing service while a system is stopped. The abovementioned requirement could not be met. Therefore, based on the process of tests of a system’s change, processing a test on a running system (on-line test) will lead to reduction of the effect on the operators. From the operator's viewpoint, on-line test technologies and the assurance evaluation technologies are proposed. By reducing the effect on the operators through introducing proper on-line tests by using this evaluation technology, smooth changes of systems are enabled and improvement of assurance is achieved.