Safety Cube presents the principal elements for design and safety integrally. The cube generates different views, and a description of several views of the safety cube follows.
- components (or sub-systems). In principle, this covers the system, its subsystems, (user)interfaces and competing or cooperating systems. The interfaces among these components and their environment, failures in components or interfaces, and the chain of physical reactions are presented by this view.
- The operation view presents the use of system structure or functions in practice. The Interaction of the system with people (or other systems) is an important aspect of the system described here in terms of operation or use. This interaction is often present at all various levels of system, super-systems, and subsystems. Next, to use, a critical view on foreseeable misuse is important. For example, scenarios for transportation, installation, operation, and recovery process might happen differently, and not exactly according to the user expectations.
- Identification of a proper set of requirements and functions are among the critical performances for systems as well as safety engineers. States of the system and fault recognition modes are examples of this. Furthermore, expectations, recommendations, or requirements for future design gives a valuable set for future designs. These are presented through the functional view.
- The time view presents changes across the time axis. While the SoI for the present time is the primary focus for designers, it is inevitable to explore the history of the system development (lessons learned) and consider future developments. While normally the information about the past (ex-generation) should be available, the implicit or explicit information about the future trend is needed. Further explanations of these views are provided through an application example.
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