LAYERED APPROACH Sample Clauses

LAYERED APPROACH. The justification of a security-informed safety case can be complex, or at least complicated, as it combines the claims from adaptation, supply chain and deployment, implementation details and hazard and vulnerability analysis. As one role of the case is to communicate effectively, one needs to balance both the risk of abstracting away important detail and the risk of the important detail being lost in a sea of other details. Abstraction is a key structuring mechanism and we have experimented with various levels of abstraction when adding and structuring claims about the system. We call these abstraction levels – the layers of assurance, because within each abstraction level the assurance is composed. The main layers of assurance that we have identified are as follows: M0 Policy and requirements – the highest level where the system represents its requirements, safety and security policies;

LAYERED APPROACH. The proposed methodology for analysis and modeling of the transformations between the e-commerce frameworks follows a layered approach. Business Infrastructures Business Context Semantics Business Processes Syntax Technical Infrastructures Figure 1 ECIMF layers of integration This approach means that in order to analyze the problem domain one has to split it into layers of abstraction, applying top-down technique to classify the entities and their mutual relationships: • First, to establish the scope of the integration task in terms of a business context – based on the economic aspects of the partners’ interactions, • Then, to identify the top-level entities and the contexts in which they occur (the data model), and how these contexts affect the semantic properties of the concepts,