A<unk>  is a measure of the exposure of a population to some hazard. Typically, the index is a composite of multiple quantitative indicators that<unk> a some formula, delivers a single numerical result. Through such an index "diverse issues can be combined into a standardised framework...making comparisons possible". For instance, indicators from the physical sciences can be combined with social, medical and even psychological variables to evaluate potential complications for disaster planning. The origin of<unk> es as a policy planning tool began with the United Nations Environmental Program. One of the participants in the early task forces has also conducted secondary research documenting the evolution of the analytic tool through various stages. The term and methodology then expanded through medical literature and social work as discussed by Dr. James O'Connell of Boston Healthcare for the Homeless.
Vulnerability index
FACE risk profile
Frailty index
Disposition index
NACA score
BODE index
EuroSCORE
Homeostatic model assessment