A logic model is an organized graphic display of the major components of a social or educational program, either an existing program or a proposed new intervention. A logic model is sometimes accompanied by a narrative description. The program components typically included in a logic model are inputs or resources (time, expertise, and financing); activities (the services, trainings, experiences, or other pursuits offered to program participants); outputs (short-term benefits for participants, e.g., steady access to job training); and short- and long-term outcomes (sustained changes in participant knowledge, skills, health, status, opportunities, and well-being). Beginning in the 1980s, the construct of a logic model was iteratively developed and implemented by the community of program evaluators, primarily in the United States.

For evaluators, a logic model provides an ...