The first phase is to define and understand children's experiences of food insecurity to be measured, it involves gathering knowledge from key informants, developing an interview guide, selecting a sample, and conducting focus groups and/or interviews. The second phase is to break down the food insecurity experiences into measurable components, it involves summarizing the interviews, classifying children by types and severity of experiences, summarizing interviews across children by theme, and identifying domains of food insecurity that discriminate children. The third phase is to create questionnaire items to assess the domains of food insecurity experiences, it involves developing or adapting items and answers and then review by local informants and experts.