Is scale the only difference with mass appraisal?
No, mass appraisal involves the coordination of many people, tasks, and appraisal judgments. Even though single and mass appraisal both use the three basic approaches to value and both require market research, mass appraisal strongly emphasizes standardization. The standardization of procedures, methods, valuation models, and tables helps to ensure property tax equalization. One final difference is that mass appraisal employs statistical testing and quality control, as opposed to one appraiser’s empirically based, yet unscientific, judgment.
