A Logic Model is a brainstorming tool to help you capture all elements of a proposed project. Think of it as a machine diagram to visualize the inputs and outputs of your project. The project might be for research, teaching or some kind of social intervention.
When devising a project, we often focus on only one element, usually the activity we want to carry out. By laying out the project elements visually, a Logic Model forces us to think about the impact on the one hand (big-picture) and the resources we’ll need to carry out our activity (nitty-gritty details) A Logic Model is a good basis for an outline of a grant proposal, especially if you need to identify areas for data collection or project evaluation. It put the goals and objectives front and center while also leaving room to capture
The image below comes from the Kellogg Foundation’s Logic Model Guide
Below is a great, if somewhat long, overview of logic models presented by Yvonne Watson of the U.S. Environmental Protection Agency.