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Composite Diagnostic Index (ITI Layer 3)
DT
The Composite Diagnostic Index (ITI Layer 3) is the top integrating layer of the Integrated Threat Index, combining the lower-layer signals — organism aggressiveness, substrate vulnerability (SVI), atmospheric delivery and microclimate — into a single composite score of a surface's overall risk and intervention priority. It is the monograph-level diagnostic addressed to the most technical audience, and the number that lets the COSMOS engine rank and schedule across a portfolio rather than assess surfaces in isolation.
building-surface stewardship
The Composite Diagnostic Index (ITI Layer 3) is the top integrating layer of the Integrated Threat Index, combining the lower-layer signals — organism aggressiveness, substrate vulnerability (SVI), atmospheric delivery and microclimate — into a single composite score of a surface's overall risk and intervention priority. It is the monograph-level diagnostic addressed to the most technical audience, and the number that lets the COSMOS engine rank and schedule across a portfolio rather than assess surfaces in isolation.
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