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Composite Diagnostic Index (ITI Layer 3)
DT
A single surface can face several threats at once — an aggressive organism, a vulnerable material, a heavy airborne load. The Composite Diagnostic Index brings those separate signals together into one overall risk score, so across a whole property or portfolio we can see clearly what needs attention first.
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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