Which of the following is NOT a type of mass appraisal model structure?

In mass appraisal models, various structures are used to estimate property values effectively. The additive model incorporates the effects of individual property characteristics by adding their contributions to the final value estimate. The multiplicative model, on the other hand, involves multiplying characteristic values or coefficients to arrive at an overall property value, which can better account for interactions between different property attributes. The hybrid-generic model combines elements from both additive and multiplicative approaches to improve estimation accuracy and flexibility in handling diverse property types.

While transformative modeling may refer to techniques that adapt data for improved analysis or presentation, it does not represent a recognized or distinct type of mass appraisal model structure in the traditional sense. Therefore, this option stands out as the one that does not fit within the commonly accepted categories used in mass appraisal methodologies.