Welcome to Innovation Network’s Logic Model Workbook. A logic model is a commonly-used tool to clarify and depict a program within an organization. It serves as a foundation for program planning and evaluation. This workbook is a do-it-yourself guide to the concepts and use of the logic model. It describes the steps necessary for you to create logic models for your own programs. This process may take anywhere from an hour to several hours or even days, depending on the complexity of the program.