The LSFF Operational Overview describes the purpose and target audience for tools to assess diets, markets, and diet cost and affordability, and summarizes the key steps in the methodology, including a decision tree on how to select existing data to conduct a needs assessment and design/redesign LSFF and broader programming. The Methods Guide describes the "how" of each step in the methodology. The Case Study document provides examples of challenges and lessons learned in applying the methodology. The Operational Overview, Methods Guide, and the Case Study document complement the USAID Large-Scale Food Fortification Programming Guide and results framework by providing methods to use existing data to better understand the contribution of LSFF programs to improve micronutrient intake, and ultimately, to help achieve the strategic objective and intermediate results in the USAID LSFF results framework.