This tool guides you how to do a rather simple cost effective analysis. At some point in the project management cycle, you may think of doing this, or you may be asked to answer questions like: In order to create 1% change in a people’s perception of HIV/AIDS, how much a campaign has spent? Is it worth doing so?
http://www.tools4dev.org/resources/how-to-do-a-basic-cost-effectiveness-analysis/
