Practices in Model Component Reuse for Efficient Dependability Analysis

Model-based dependability analysis provides an effective manner to evaluate and design the dependability of critical IT systems by abstracting the system architecture and operations. As the size and the complexity of systems increase, however, the process to compose the dependability model becomes complicated and time-consuming. Improving the efficiency of modeling process is practically an important challenge of dependability engineering. In this paper, we review the techniques for model component reuse that makes dependability model composition and analysis more efficient. In particular, component-based modeling approaches for reliability, availability, maintainability and safety analysis presented in the literature are summarized. In order to effectively apply model component reuse, we advocate the importance of asset-based dependability analysis approach that associates the reusable model components with underlying system development process. Finally, we discuss the necessary extensions of these techniques toward efficient dependability analysis for IoT systems which are significantly affecting real world.