Thursday, July 16, 2026

Introducing DEMA™ (Double-Entry Mass Appraisal)

What if the traditional one-step CAMA approach is the root cause of the appeals tsunami?

We’ve been building a better way.

In Sessions 4A and 4B, we demonstrated the complete Double-Entry Mass Appraisal (DEMA™) protocol:

· First Entry (Sales-Based Modeling): Builds the tentative roll with econometric soundness (BLUE status) and IAAO compliance.

· Second Entry (Population-Based Equalization): Cleans the roll by identifying and correcting population-level distortions before it is finalized.

This two-sided ledger approach — DEMA™ — is the true Nirvana of modern mass appraisal: proactive equity instead of reactive defense.

Session 4C, the grand finale of Phase 1, will deliver the final Champ-Challenger showdown between the Central Taxing District and the Town Taxing District. This direct comparison will identify the major faultlines when the jurisdiction roll is generated by two separate models (in-town vs. suburbs). 4C will complete our end-to-end DEMA™ solution next week.

To read Session 4B and run the DEMA™ Protocol on your own database:

Link to Substack

Link to Patreon

If you work in assessing, serve on a VAB or Review Commission, or consult in this space, DEMA™ offers a practical path to stronger rolls and fewer appeals.

Tag colleagues who should see this series:

#DEMA #CAMA #IAAO #MassAppraisal #PropertyAssessment #ValuationModeling #VAB 

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Introducing DEMA™ (Double-Entry Mass Appraisal)

What if the traditional one-step CAMA approach is the root cause of the appeals tsunami? We’ve been building a better way. In Sessions 4...