Table 2. Summary of tools proposed for building resilience evaluation.

	E-index		I/O ratio
	Instantaneous	Cumulative (entire episode)	Instantaneous	Cumulative (entire episode)
Whole building	Monitor and inform building occupants of air pollutant exposure	Rank or benchmark buildings by occupant exposure relative to guideline exposure limits	Assess whole building interventions (e.g. AHU filter upgrades, changing controls, adjusting outdoor air intake or economizers)	Rank or benchmark buildings by ability to prevent infiltration/ penetration of outdoor pollutants. Predict building’s performance under various outdoor air pollution scenarios
By space	Monitor and inform occupants of air pollutant exposure	Identify areas in a building with high potential occupant exposure	Assess zonal or room interventions (e.g. window operation, portable air filters, filter upgrades at the zone)	Rank or benchmark spaces