Critical infrastructure (CI) resilience is the ability to prepare for disasters, manage disruptions, recover from them quickly, and absorb the lessons learned. Since CI consists of numerous systems of systems (SoS) that are managerially and operationally independent, their resilience is often difficult to maintain.
In recent years, architecture frameworks, guidelines, and international standards have been developed to engineer SoS effectively. For instance, UAF (OMG, Unified Architecture Framework), one of the leading architecture frameworks, provides 71 View specifications, domain metamodel, and profile of the modeling language useful for SoS engineering. However, for Systems Engineers (or SoS Engineers) to effectively utilize such advanced architecture frameworks and practice engineering, it is essential to have a reference architecture that comprehensively captures the target SoS. In this presentation, using the Japanese chemical industry as a case study, we will discuss the architecture that characterizes the resilience-oriented SoS engineering process. The architecture is described by the Integration Definition 0 (IDEF0), and the process of adapting to safety regulations and actual disasters in the Japanese chemical industry is shown in the case studies. The architecture, which captures the life cycle of the chemical industry, is expected to facilitate collaboration among stakeholders and enhance resilience in the chemical industry.