This article considers an existing geometric attribution model and introduces a new one. The analysis is based on a conceptual framework grounded in a symmetry principle. This principle closely relates to a more general principle of invariance to permutations, well developed in mathematics. The framework consists of a few fundamental principles, or concepts, validation tools, and verification criteria. Geometric attribution methods are analyzed within this framework. Some inadequacies in the present attribution method have been discovered, and anew model has been developed and verified.