See below image for the Health impact assessment process diagram. Health Impact Assessment (HIA) is a practical approach used to judge the potential health effects of a policy, programme or project on a population, particularly on vulnerable or disadvantaged groups.
This publication provides a balanced view on five different types of impact assessments (environmental, strategic environmental, social, sustainability, and health impact assessments). It uses four key questions to examine how these assessments protect human health.
According to Human Impact Partners, a US-based HIA consultancy, intermediate HIA can cost as little as $12,000, while comprehensive HIA can cost upwards of $175,000.