EVANS DISASTER IMPACT SCALE

The Evans Disaster Impact Scale (EDIS) is based upon the award winning master’s thesis, Universal Disaster Impact Scale, by Relief Aid Consulting’s founder, Brian J. Evans, of Richmond, Virginia. The scale provides a rating from which the users can judge the impact of a disaster on a given area.

The rating given by the EDIS is derived from a formula consisting of three factors. The first factor, the Human Factor, examines the disaster’s impact on human populations (i.e. fatalities, injuries, displaced, and affected). The second factor, the Disaster Analysis Factor, comprises a more general analysis, evaluating a disaster’s environmental and physical impacts, among others. The Economic Factor is the final component of the formula. It quantifies the economic resources available in a certain area and the degree to which those resources may help mitigate the severity of a disaster.

The Economic Factor provides the context for the EDIS. It can be used on various levels depending on the need. For example:

1. Global Level – The impact an earthquake has on one country can be measured and evaluated against the impact a flood or a typhoon has on a different country.

2. National Level – If a hurricane were to impact numerous states or provinces within a country, the EDIS provides a means by which to evaluate which state or province sustained the worst impact within that country.

3. State/Province Level – If a flood were to impact a number of counties within a state, the EDIS provides a means by which to evaluate which county sustained the worst impact within that state.

Whether you are a government agency, a humanitarian aid organization providing disaster relief aid to an impacted area, or an individual hoping to contribute with a directional earmark on your donation, Relief Aid Consulting looks forward to providing you assistance in an unbiased manner, hoping to direct resources to those most in need.

EDIS Confidence Rating 
This rating is dependent on the disaster impact data acquired and used in the analysis to establish an EDIS rating.

Low – Minimal disaster impact data acquired.  Additional data could change the EDIS rating significantly.

Medium – Additional disaster impact data could have a moderate affect on the EDIS rating.

High – Additional disaster impact data will have a minimal affect on the EDIS rating.