The contractor will design and implement a multi-annual mixed-methods survey and qualitative research for the ILiPS and CDRD projects in South Sudan. The services include the development, adaptation and translation of questionnaires for household surveys, including a dedicated module on women of reproductive age. The questionnaires must follow a layered design with "must-have" questions for donor reporting and project steering, "should-have" questions to ensure context-specific adaptation of core themes, and "nice-to-have" questions that can be added according to regional or cohort-specific needs. All tools are to be translated into relevant local languages and pre-tested in the field to ensure clarity and feasibility, and must be designed in a conflict-sensitive and culturally appropriate manner. Sampling must ensure representativeness at state and cohort level with a margin of error of eight percent for both state-level and displacement-strata estimates. Each beneficiary sample shall be matched by a control group of non-beneficiaries in neighbouring Payams, representing half the sample size. The contractor will apply stratified random sampling and use a digital data collection tool, preferably Survey Solutions on GIZ servers, in order to guarantee secure and efficient handling of data. Comprehensive training of enumerators, field supervision and quality assurance measures are required throughout. The contractor will carry out household surveys for each cohort at the relevant survey stage. For ILiPS, this includes midline data collection in two states in 2026. For CDRD, this includes midterm and endline data collection for the 2024 and 2025 cohorts, as well as a final endline across all states in 2028. The surveys will gather information on sustainable food production capacity, income-generating activities and diversification, household consumption patterns and nutrition, as well as the adoption of sustainable farming practices following project-supported trainings