Process is a course of action or series of activities.

Outcomes — the effect the process has had on the people targeted by it. These might include, for example, changes in their self-perceived health status or changes in the distribution of health determinants, or factors known to affect their health, well-being, and quality of life.

Output — the product or results of the process. These might include, for example, how many people a project has affected, their ages and ethnic groups, or the number of meetings held and the ways in which the findings of the project are disseminated.

WHO. Programmes and projects. Health Impact Assessment. Glossary of terms. Internet. Accessed on April 29, 2010.