Tetraedrisk

Tetraedrisk is a conceptual framework used to model and quantify risk through a tetrahedral representation. It is designed to provide a compact visualization and a simple method for aggregating multiple risk dimensions into a single, comparable score.

The framework rests on four dimensions that commonly influence risk assessments: probability (P), impact (I), detectability (D), and containment capacity (C). Each dimension is typically scaled to a value between 0 and 1, where higher values indicate greater concern. A given risk scenario is represented as a point inside a tetrahedron, with the four vertices corresponding to the minimal values in each dimension. This geometric setup allows analysts to examine how changes in one dimension affect overall risk relative to the others.

Scoring and interpretation in tetraedrisk often rely on barycentric coordinates. The four dimension scores determine a position within the tetrahedron, and the overall risk magnitude can be summarized by a tetraedrisk score (TRS). This score can be computed as a weighted sum of the four dimensions or as a distance from a designated low-risk corner, depending on the chosen convention. The geometric nature of the model also supports visual comparison of multiple scenarios side by side.

Applications of tetraedrisk span safety engineering, project and operational risk management, cybersecurity, and financial risk analysis. It offers a straightforward visualization to communicate trade-offs and to support decision-making. Limitations include dependence on the selected four dimensions and their scales, potential subjectivity in scoring, and the possibility that interdependencies between dimensions are not fully captured by a simple tetrahedral representation.

See also: risk analysis, FMEA, bow-tie diagram, polyhedral models, barycentric coordinates.