The large scale Socio-Demographic Economic Survey (SDES) is an effective mechanism for obtaining quality provincial, district and village data for key development indicators. The survey compiles data on population distribution, education, employment, migration, functional disability, fertility and mortality disaggregated by age and sex, and housing. Reliable and valid data provided by the SDES is required for responsive and evidence-based policy and planning, monitoring and evaluation of development and humanitarian programmes.